AVC for Web - Imagine Communications
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1. c cccscesssecsscecssesessseceeseecseeessaeessseeseseeeesaeessaeeseneeees 12 EIERE EDD 12 EE DECHE 13 ELE DER TE 13 GOP SQTtUA SS seses icere eee senes reae eai e aee ea sash usuduyesdsicudeeuataugees assists ydaduses e aae Eep EEE TEE 14 Rate Control Setting Sisid nicsen iaee ae aae e ae eaae Eed 14 Motion Estimation Settings siirre a a a EE EE E E eee E 14 Rate Distortion Optimization Settings s sssssssesrsesrrrsrrerrrrrrrsrrrrrrrrenrerrrrenrrerrrenrrerrrerreernrennrerneernnt 15 Slice SEttiN EE 15 Loop Filter deblocking Setting 15 Multi Threading Setting 15 Fidelity Range Extension Settings ccccccccssssssssececececsssesseeeeeeecesseeaeeeeeeesessesauseseeeesseesesenaeeeseesseesees 16 VUI video usability information Settings ccceccecccsscececsssceeecsssceesessssecscseeseescsesseeecsseeeeeceseaeess 16 le een TE 17 Archive File Writer Configurations ccncrcnirticnrent nande tnine ninnaa ie eranen ine si inaa nr aa ie inae ees GERNE Rien 19 Program Parameter EE 19 Video Parameters ocicisse ces icesedteiawecacissetoeds sate cgekidoenetegeet decthelenecdece R SRA ENE AAA OE EAA 24 Audio Parameter Sosson S NANE AETA SEEE EAN EANN ESENS 24 Data Parameters a ssiieniiniresn asierea e e iaae eaaa a a E aeea RE eai Ea 24 2015 Imagine Communications Corp Proprietary and Confidential Page 3 AVC for Web User s Manual AVC for Web AVC for Web This codec allows you to create the AVC H 264 video streams2. Enable the checkbox next to the Archive button then click on the button to open the dialog that allows you to set the Archive filename Note that if you hover your mouse over the Archive filename you will see a list of tags that can be used in the file name as metadata place markers For example you can use D_ to add the date to the file name 2015 Imagine Communications Corp Proprietary and Confidential Page 6 AVC for Web User s Manual AVC for Web Broadcast Output from the Codec Profile Access the Broadcast output by selecting the RTP processor and then selecting the Output tab Codec profiles r FFERI Codec Profile Input video Process Output Statistics Reme e OG e e 9P Flash9_AVC_CBR_640x480_1 5M Broadcast Push Trigger Stop Flash Media Server GOP Geiger e Sp Serwer URL rtmp localhost 1935 live ETA i Stream name Flash9_AVC_SD O Video Server type Server with no password O Audio Se p lt Concurrent Mode v fd Enable the checkbox next to the Broadcast Push button then click on the button to open the settings for the RTP streaming Buin Server External Server Flash Media Server V Send to Flash media server Server URL Stream Name Server Type Username f rtmp 203 145 765 102 LiveEvent Server with no password S
3. set in the Advanced Settings with a default of 1000 ms The larger the buffer the more the instantaneous bit rate may fluctuate If you will be playing a media stream to a hardware decoder such as a set top box then you should use the CBR Filler mode to ensure a HRD compliant stream When using VBR the bitrate specified is an average target bitrate over a period of time defined by the size of the buffer but the actual bitrate can be larger or smaller than the value specified The larger the buffer the more the instantaneous bit rate may fluctuate where the buffer is the target bitrate multiplied by the VBR delay in milliseconds set in the Advanced settings with a default of 2000 ms VUI Video Usability Information Settings Video Format Select the video format of your input Picture Aspect Ratio The aspect ratio mode defaults to define the picture aspect ratio The drop down box allows you to select 4 3 16 9 or custom to allow you to enter your own aspect ratio values Should you need to set the Sample Aspect Ratio instead of the Picture Aspect Ratio open the Advanced Settings and the last setting is an option to change modes to Sample Aspect Ratio Sample Aspect Ratio If you have selected this aspect ratio mode in the Advanced Settings you will see a list of 15 available sample aspect ratio values including Extended SAR to allow you to specify a user defined sample aspect ratio GOP Settings Use the settings in this
4. the time to wait before removal of Access Units AU from the buffer Every AU contains exactly one picture The Initial CPB removal delay setting is the initial fullness of the Video Buffer Verifier VBV in 1 90000 sec The default value of 1 means 90 vbv_length 2 The initial fullness of the VBV buffer has to have a minimum delay of 25 of the VBV buffer length So if an encode has a VBV buffer length of 5000ms then the minimum value of the initial CPB removal delay will be 5000ms 0 25 90kHz 112500 which is 1 125 sec Examples For CBR mode default VBV length is 1000ms therefore the initial CPB removal delay equals to 90 1000 2 90000 sec 0 500 sec For VBR mode default VBV length is 2000ms therefore the initial CPB removal delay equals to 90 2000 2 90000 sec 1 000 sec Motion Estimation Settings Macroblock Subdivision Macroblock subdivision flags enable macroblock subdivisions for motion estimation and encoding Subdivision 16x16 is always enabled because it is mandatory for motion search operations Search Range Maximum search range in pixels default of 1 means that it will be calculated range is 1 64 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 14 AVC for Web User s Manual AVC for Web Maximum Reference Frames Number of pictures frames or fields used for inter motion search where the higher the number the slower the search ran
5. AVC encoding tools The AVC for Web codec supports Baseline and Main profiles e Baseline This profile is designed for low complexity decoders such as video conferencing and some older mobile phones Supports I P Frames supports progressive and CAVLC only e Main This profile is intended for general uses such as stored content for VOD multimedia mobile and the internet Supports I P B Frames supports progressive and interlaced and offers CAVLC or CABAC Coding Tools Baseline Main High Error Resilience X and P Slices X X X 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 9 AVC for Web User s Manual AVC for Web CAVLC X X X CABAC X X B Frames X X Interlaced Coding MBAFF X X 8x8 vs 4x4 transform adaptivity X Quantization Scaling Matrices X Separate Cb and Cr QP control X Monochrome video format X Level Levels place limits on the encoding parameters in order to limit the computing power required by a decoder There are 16 levels levels 1 to 5 each with sub levels that can be used by the AVC H 264 codec Each level specifies a typical frame size frame rate and a maximum data rate The AVC for Web codec support levels 1 to 4 2 Level Max video bit rate for Max video bit rate Examples for high resolution frame number Baseline and Main Profiles tor High Profile rate max stored fra
6. Imagine COMMUNICATIONS QW User s Manual AVC for Web for SelenioFlex Ingest February 2015 Delivering the Moment imaginecommunications com AVC for Web for SelenioFlex Ingest User s Manual Publication Information 2015 Imagine Communications Corp Proprietary and Confidential Imagine Communications considers this document and its contents to be proprietary and confidential Except for making a reasonable number of copies for your own internal use you may not reproduce this publication or any part thereof in any form by any method for any purpose or in any language other than English without the written consent of Imagine Communications All others uses are illegal This publication is designed to assist in the use of the product as it exists on the date of publication of this manual and may not reflect the product at the current time or an unknown time in the future This publication does not in any way warrant description accuracy or guarantee the use for the product to which it refers Imagine Communications reserves the right without notice to make such changes in equipment design specifications components or documentation as progress may warrant to improve the performance of the product Trademarks Stream Stream Live SelenioFlex Ingest and SelenioFlex are trademarks or trade names of Imagine Communications or its subsidiaries Microsoft and Windows are registered trade
7. and AAC MP3 audio streams that can be broadcast as RTP or RTSP packets and sent to a Media Server for live streaming or archived to an MP4 or FAV file You can also use this codec to archive to other file formats that use AVC AAC and are based on the same MPEG4 processor 3GPP QuickTime MOV iTunes M4V When you install the SelenioFlex Ingest software sample AVC for Web projects are installed You can use these sample projects as a guide when creating your own projects Creating a Codec Profile From the main menu select Codec Profile gt AVC for Web Profile Name Used as the file name of the codec profile the file used to store the settings Video Choose to encode the video to AVC or none if you choose none then you will create an audio only output Click the Configure button to choose the video encoding settings Audio Choose to encode the audio to AAC MP3 or none if you choose none then you will create a video only output Click the Configure button to choose the audio encoder settings 2015 Imagine Communications Corp Proprietary and Confidential Page 4 AVC for Web User s Manual AVC for Web Subtitle When encoding an Archive file you can encode up to 2 timed text tracks by switching from none to SRT The information for these timed text tracks can come from the NTSC VBI data line 21 the closed captioning embedded in an MPEG2 file or from the 608 708 data in an SDI input signal r Profi
8. e and iTunes wrapper The closed caption source is a SCC file Add Closed Captions Enable this if you want to create a closed caption track SCC Filename Browse to the SCC file that is to be used as the source of the closed captions SCC Language Code You may specify a language code for the closed captions using the 3 character ISO 639 2 T code Flash QuickTime Timecode Track A timecode track can be created if you are using the Flash F4V or QuickTime MOV wrapper Other wrapper types do not use this track Add Timecode Track Enable this if you want to create a timecode track Starting Timecode Specify the starting timecode if you have enabled the timecode track Flash System Time The system time can be written into the Flash FAV file System Time Source The system time can come from the following sources e Custom system time set Start time below 2015 Imagine Communications Corp Proprietary and Confidential Page 23 AVC for Web User s Manual AVC for Web e Local system time e UTC Coordinated Universal Time system time Embed System Date When this is set to Yes then the muxer will embed the system date Start Time When the System time source is set to custom then you use this setting to define the starting date time The digits are defined as follows year month day hours minutes seconds and milliseconds Video Parameters Video name The name for the video track Language code You may specify a la
9. e your file for progressive download then this index will have to be moved to the beginning of the file so that it is the first thing that is downloaded and the playback can start right away When progressive download is enabled the muxer will attempt to determine the amount of space to leave at the beginning of the file for the moov box containing the metadata needed to start playing the file If the actual duration of the encode can be determined from the source e g the file duration for a transcode or the duration of a deck captured clip then that duration will be used You can also set the Estimated Max Duration of the encode so that the muxer can leave space at the beginning of the file even when the duration of the encode cannot be determined from the source for example a live capture that will be manually started and stopped If you enter an estimated duration of 0 then no space will be left at the beginning of the file Instead the file will be written as normal in a first pass with the index at the end as though progressive download were disabled and then a second pass file will be created with the index being written at the beginning of the file and then the first pass file will be deleted That means that you must have at least twice as much free space on your hard drive as you will need for the final progressive download file NOTE If you enable Progressive download in the Muxer then you do not need to enable it in the Archi
10. eading Settings Disable Multi Threading Set to False to enable multi threading Num Threads Number of worker threads to run Zero means automatically set the value equal to the number of CPUs Max Pict Tasks Maximum number of simultaneously coded pictures 0 5 Default is 1 auto Known issue with DRC 5550 5600 and 5650 board If you are encoding to multiple AVC codec profiles in a single project and using one of these DRC boards then set the Num Threads and Max Pict Tasks to 4 Do not use the default values This does not apply to other DRC capture boards 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 15 AVC for Web User s Manual AVC for Web Fidelity Range Extension Settings The fidelity range extension settings are only available for High Profile 8x8 Transform Mode Enable 8x8 transform Baseline and Main only support 4x4 transform VUI video usability information Settings Aspect Ratio Mode This setting controls whether Picture aspect ratio or Sample aspect ratio will be shown in the main settings page s VUI Settings drop down box 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 16 AVC for Web User s Manual AVC for Web Audio Configuration The AVC for Web codec includes the Dolby Pulse AAC audio codec If you have an older version of SelenioFlex Ingest you can also continue using t
11. erver URL rtmp Aocalhost 1935 Stream name MyTest Server with authentication v Username shari beck Password eeseseseeg Max Connection Attempts If you will be sending your video directly to a Flash Media Server use the Flash Media Server tab to enter the server URL and to give your live stream a name You can add more than one server to the list clicking the Add New button to add another server If your server does not require authentication no username or password required then you can choose Server with no password If you are using a Flash Media Server with authentication you can choose Server with authentication If you are specifically using a Flash Media Server hosted at Akamai Highwinds or Limelight select the CDN and enter the username and password as required by the CDN 2015 Imagine Communications Corp Proprietary and Confidential Page 7 AVC for Web User s Manual AVC for Web You can also specify the maximum connection attempts This is the number of times the SelenioFlex Ingest software will attempt to contact the server before it fails the encode Other Output Options If you select the root of the codec profile you will see the other available Output options The options shown will be different depending on whether you have a license for SelenioFlex Ingest LE or SelenioFlex Ingest FE Please refer to the main SelenioFlex Ingest Software User s Guide for more informat
12. ethod captioning ISMA MPEG4 wrapper automatically creates two extra system tracks in the file one for the objects description and one for the scene description 3GPP Limitations e 1 video and 1 audio track maximum for 3GPP e 1 Timed Text Track maximum for 3GPP MP3 audio in F4V F4A can be played back in a Flash 9 player or higher Other commonly used media players such as the QuickTime player and VLC Player can be used to play back files with AVC MP3 Additional features supported by all ISO wrappers e Hinting on AVC AAC tracks e Timed Text Tracks permits subtitling using an SRT file as the source for the timed text e Language definition using the 3 character ISO 639 2 T code on video audio text tracks chapters and closed captions e Embed metadata from an xml file Additional feature only supported by the QuickTime wrapper QuickTime Timecode Track ISO branding This can be used to tag the ftyp box of the file as isom instead of the default of mp42 This is required by some playback devices The default is No 2015 Imagine Communications Corp Proprietary and Confidential Page 20 AVC for Web User s Manual AVC for Web Enable hinting Hinting adds metadata tracks to the file that tell a Streaming Media Server how to divide the file into packets for delivery from a server as a live stream Regular playback of a file from a hard drive does not require a hint track if the h
13. ge is 1 5 Rate Distortion Optimization Settings Speed Mode This setting can be used to improve picture quality at the expense of encoding performance The algorithm optimizes the encoder decision making process by doing some sample coding and then choosing the best variant among the samples There are 4 options plus disabled and automatic The options range from Good quality to Max quality Setting automatic allows the encoder to select the speed mode necessary to ensure real time encoding Slice Settings Slicing is used to divide a frame into sections slices to allow parallel processing of each slice Note with the update to this AVC codec in SelenioFlex Ingest 3 0 the Studio AVC encoder is also capable of using multi threaded encoding even when using only one slice so normally you should set the slice mode to Disabled Slice Mode Select the slice mode e Disabled do not slice equivalent to use one slice e Number of CPUs set the number of slices to the number of CPU cores detected in the system e Custom set the number of slices to the Number of slices setting Number of Slices When Slice mode is set to Custom use this setting to determine the number of slices Loop Filter deblocking Settings Enable Deblocking When this is enabled a deblocking filter is applied to the edges of each 4x4 or 8x8 transform block to improve visual quality by smoothing the sharp edges which can form between blocks Multi Thr
14. he Nero AAC audio codec EP Profile Name _ About _ Audio Audio Encoder Configuration Number of Channels 2 0 L R D Sample rate 44 1 kHz Data Rate 64 gt kbps Limit Max Frame Size Encode Mode HE AAC v 2 X Metadata Metadata Disable Metadata x Ext Metadata Dialogue normalization 27 dB Dynamic Range Control DRC DRC Line Mode Film Standard DRC RF Mode Film Standard Help L o Number of Channels Set the number of channels you want to encode e Mono 1 0 C e Stereo 2 0 L R e Stereo HE v 2 2 0 L R PS v2 If you have a Dolby Pulse Surround license you will also be able to pick one of the surround channel configurations Sample Rate e Pick 44 1 kHz if you will be encoding for live RTMP broadcast e Ifyou will be encoding files you can pick 48 44 1 or 32 kHz Data Rate The maximum peak data rate The data rates that you can select based on the number of channels that you have set will be shown in the drop down box When you first select a new Number of Channels setting the data rate shown will be the optimum data rate for that number of channels 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 17 AVC for Web User s Manual AVC for Web Limit Max Frame Size This is only used for Sony PSN BIVL compliant AAC encoding It should not be enabled if you are not encoding for these de
15. int track is present it will be ignored by the player Hinting does increase the size of the file so if you do not need it your files will be smaller with hinting turned off RTP packet size This setting is only enabled when Enable Hinting is set RTP packets are used when streaming a file from a Streaming Media Server This setting is the maximum RTP packet size The default value of 1450 bytes is slightly less than the maximum Ethernet Frame size Alternate audio This setting is only useful if you have more than one audio track in the program If there are multiple audio tracks and this setting is enabled then only one audio track will be active at a time based on the language selection of the track Chunking Mode In the MPEG4 data container a chunk is a set of contiguous samples from the same stream For example a chunk duration of 1 second means that 1 second of video will be stored then 1 second of audio will be stored etc The shorter the chunk duration the less the decoder will need to buffer before playback can begin however a short chunk duration will produce files with larger metadata so the overall file size will go up as chunking duration goes down A good trade off is a duration of 1000 milliseconds the default value There is more than one way to specify the chunk duration e Duration Chunks will have the specified duration e GOP Count Chunks will have the specified duration e GOP Count and duration Chun
16. ion on these output options PE eg Codec profiles Codec Profile Input Audio Levels Audio Process 1 Video Process Output Statistics Remote Op FlashS_AVC_CBR_640x480_1 5M EES O Video O audio S 99 Flash9_AVC_CBR_320x240_300K S P RTP Video Audio Hoooado lt E e Buffer usage 0 Dropped 0 frames CPU 4 NTSC 720 X 480 0 0tps v 00 00 00 A 00 00 00 O la k CERE 2015 Imagine Communications Corp Proprietary and Confidential Page 8 AVC for Web User s Manual Video Configuration AVC for Web The video configuration window opens with a window that covers the most common settings you will need There is also an Advanced Settings window to give you access to some additional settings Digital Rapids AVC for Web Profile Name General Rate control Frame size 640 x 480 Mode CBR x Profile Main Di Bitrate 1000 kbps Level ER o Interlace mode Encoding CABAC ae Frame rate 29 97 VUI settings V video Format NTSC BE LL Picture aspect ratio 14 3 Di GOP settings GOP size max GOP size with scene detection x Max key frame interval 5 seconds GOP IDR control closed GOP x Maximum B frames 2 Adaptive number of B Frames Advanced settings Frame size the video image size in pixels Profile A profile limits the video encoding tools to a specific sub set of the available
17. ks will have the specified duration and will contain at least the specified number of GOPs If the video does not contain GOPs the chunking mode will be defaulted to Duration e GOP Count or duration Chunks will contain the specified number of GOPs or will last no longer than the specified duration If the video does not contain GOPs the chunking mode will be defaulted to Duration Chunking duration GOPs per chunk Depending on which Chunking Mode you set above one or both of these fields will be open so that you can set the chunk size 2015 Imagine Communications Corp Proprietary and Confidential Page 21 AVC for Web User s Manual AVC for Web Fragmented When this is set to Yes then the muxer will create a fragmented movie structure this may reduce interoperability Fragmented movies cannot be hinted and progressive download cannot be activated The chunking duration should be longer than the GOP size default to 5 seconds The following settings must also be set when Fragmented is set to Yes e Base data offset mode e Fragment mode e Fragment duration e GOPs per fragment Progressive download The MPEG 4 muxer stores information about the file that allows you to play and scrub the file in a type of index The file will not start to play until the player can access this index Normally this index is written at the end of the file after all the information about the file has been generated If you plan to us
18. le name AVC for Web Video AVC e Configure 640 x 480 1000kbps Audio Dolby Pulse AAC w Configure 64kbps 44 1kHz 2 Channel Subtitle SRT e Configure VBI CC1 None e Ancillary data V Convert SCTE 104 to Cue Points Output Broadcast and Archive v Configure configured Gee avezan Gsave_ cancel Ancillary Data If you are using an SDI input from a Flux board then you can choose to Convert SCTE 104 to Cue Points in the RTMP broadcast stream This functionality is not supported on older DRC capture boards SCTE 104 data is typically used to trigger ad insertion If you do use the SCTE 104 option you can also use the plugins that are also triggered by SCTE 104 data to replace the audio and video between splice points SCTE 104 Audio Replacement replaces the audio between SCTE 104 splice points with silence SCTE 104 Video Replacement replaces the video between SCTE 104 splice points with black Note that the player functionality is used to switch to the server which is delivering the alternate content usually local ads during the SCTE 104 break The SelenioFlex Ingest encoder does not do the ad insertion it simply provides the cue points that will be used to determine when to insert the ads Output Options are Broadcast Archive or Broadcast and Archive that is create both outputs from the same video audio data If you choose Archive or Broadcast and Archive the Configu
19. marks of Microsoft Corporation All other trademarks and trade names are the property of their respective companies Dolby and the double D symbol are trademarks of Dolby Laboratories Notice about Dolby Pulse Encoder in Imagine Communications Stream Confidential unpublished works Copyright 1993 2000 Dolby Laboratories All rights reserved Contact Information Imagine Communications has office locations around the world For domestic and international location and contact information visit our Contact page http www imaginecommunications com company contact us aspx Support Contact Information For domestic and international support contact information see e Support Contacts http www imaginecommunications com services customer care aspx e eCustomer Portal http support imaginecommunications com e Academy Training http www imaginecommunicationsacademy com 2015 Imagine Communications Corp Proprietary and Confidential Page 2 AVC for Web User s Manual Contents Contents Pye TOI Vy E EE 4 Creating a Codec Profile ccccccccccessssceceessececeeaeeecsesaeeecsesseeecsesaeeecsesseeecsesaeeecsesaeeecsesaeeeceesaeeeesesaeeeeseaaes 4 Archive Output from the Codec Proftle 6 Broadcast Output from the Codec Profile 7 Other allge gl L EE 8 Video Conturi Masri eee Cnr eter reece eee ce ae ee a ee 9 EI 9 Rate Control sesiis a A EAEE ENNES ES ces DEER casi ANE 12 VUI Video Usability Information Settings
20. mes in Level 1 64 kbit s 80 kbit s 128x96 30 9 8 176x144 15 0 4 1b 128 kbit s 160 kbit s 128x96 30 9 8 176x144 15 0 4 1 1 192 kbit s 240 kbit s 176x144 30 3 9 320x240 10 0 3 352x288 7 5 2 1 2 384 kbit s 480 kbit s 320x240 20 0 7 352x288 15 2 6 1 3 768 kbit s 960 kbit s 320x240 36 0 7 352x288 30 0 6 2 2 Mbit s 2 5 Mbit s 320x240 36 0 7 352x288 30 0 6 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 10 AVC for Web User s Manual AVC for Web 2 1 4 Mbit s 5 Mbit s 352x480 30 0 7 352x576 25 0 6 2 2 4 Mbit s 5 Mbit s 352x480 30 7 10 352x576 25 6 7 720x480 15 0 6 720x576 12 5 5 3 10 Mbit s 12 5 Mbit s 352x480 61 4 12 352x576 51 1 10 720x480 30 0 6 720x576 25 0 5 3 1 14 Mbit s 17 5 Mbit s 720x430 80 0 13 720x576 66 7 11 1280x720 30 0 5 3 2 20 Mbit s 25 Mbit s 1280x720 60 0 5 1280x1024 42 2 4 4 20 Mbit s 25 Mbit s 1280x720 68 3 9 1920x1080 30 1 4 2048x1024 30 0 4 4 1 50 Mbit s 50 Mbit s 1280x720 68 3 9 1920x1080 30 1 4 2048x1024 30 0 4 4 2 50 Mbit s 50 Mbit s 1920x1080 64 0 4 2048x1080 60 0 4 Before starting encoding the codec determines whether or not the selected level is supported based on your other settings and if the level is too low it returns an error Interlace Mode The AVC for Web codec only support
21. nabled the number of B frames will vary depending on the footage The Number of B frames setting will change to the Maximum B frames used Advanced Settings There is an Advanced Settings button at the bottom of the window This opens an window with a list of settings that are less commonly used To change a setting highlight the setting you want to change and then click the Change button or double click on the setting Note that some settings will be grayed out That is because the setting does not apply given the other things that have already been set Each individual advanced setting window has a short text box describing the setting General Settings B Frames Direct Mode B frames direct mode can use prediction modes which use spatial or temporal direct macro blocks The default and recommended mode is temporal QuickTime Decoder Compatibility This setting will only be enabled if you set an Interlace mode of MBAFF bottom field first other modes are automatically compatible with the QuickTime decoder If you are using MBAFF bottom field first typically used for interlaced NTSC video and you plan to play the output using the QuickTime player then you should enable this setting Note that if you do not plan to play the output with the QuickTime player this setting may need to be disabled for compatibility with some set top boxes Weight Prediction for P Slices When this setting is enabled it helps to encode video scenes
22. nguage code for the video track using the 3 character ISO 639 2 T code Audio Parameters Audio name The name for the audio track Language code You may specify a language code for the audio track using the 3 character ISO 639 2 T code Data Parameters Data name The name for the data track Language code You may specify a language code for the data track using the 3 character ISO 639 2 T code 2015 Imagine Communications Corp Proprietary and Confidential Page 24
23. re button will be active to allow you to select the settings for the MPEG4 file writer Once the File writer has been configured the main window will show a status of configured Click the Save Add button to both save the codec profile to a file and to add it to the current project Click the Save button to just save the codec profile to a file but not add it to the current project 2015 Imagine Communications Corp Proprietary and Confidential Page 5 AVC for Web User s Manual AVC for Web When you add this codec profile to a project a small group structure will be created consisting of the codec profile at the root the File Writer if Archive was selected the RTP processor if Broadcast was selected and the video and audio codecs To edit the codec profile after it has been added to the project right click the codec profile by selecting the root of the group and select Adjust Profile Settings Codec profiles Codec Profile 99 Flash 9 Streaming gt RTP Adjust Profile Settings O Video CI i O Audio o D gt File Writer i O Video oO O Audio o Archive Output from the Codec Profile Access the Archive output by selecting the File Writer processor and then selecting the Output tab Codec profiles Codec Profile Input Audio Levels Video Process Output Statistics QP AVC for Web gt e el bn Archive zs SEO v Archive gt Archive Rod Filename MyMovie_ D_ _T_
24. s This is the configuration tree that is shown on the left hand pane When you are using this muxer from the AVC for Web codec you cannot change this configuration When using this muxer in SelenioFlex Ingest FE as part of the Group Codec you can change the configuration Click on the Program node in the tree This will expose all of the parameters that can be set for the file writer To change a parameter select the parameter you want to change and then click on the Change button or simply double click on the parameter The Video and Audio tracks also have their own parameters Click on the video or audio node in the tree and this will expose the parameters that can be set for that node Program Parameters General Output format The MPEG4 Muxer supports several file types that are all based on the ISO IEC 14496 12 standard 2015 Imagine Communications Corp Proprietary and Confidential Page 19 AVC for Web User s Manual AVC for Web ISO Wrapper File Video Audio Additional Alternate Chapters Other extension Audio Groups features MPEG4 mp4 AVC AAC MP3 audio Yes User data supported method ISMA MPEG4 mp4 AVC AAC Not User data 2 supported method 3GPP Zen AVC AAC Not User data supported method Flash f4v f4a AVC AAC MP3 audio Yes User data supported method QuickTime mov AVC AAC MP3 audio Yes Timed text closed supported method captioning iTunes m4v m4a AVC AAC Yes Timed text closed m
25. s the Progressive mode Note that if you are using interlaced source video selecting Progressive will not deinterlace the video If you want to deinterlace the video use the hardware deinterlacer for a live video input or the software Deinterlace Plugin for file based input Encoding There are two encoding methods available CABAC and CAVLC If you are using the Baseline profile then only CAVLC will be available CABAC compresses data more efficiently than CAVLC but requires considerably more processing to decode CAVLC is a lower complexity alternative to CABAC for the coding of quantized transform coefficient values 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 11 AVC for Web User s Manual AVC for Web Frame Rate Specify the frame rate of your source video using the drop down box to select a frame rate or the Custom option to enter in a user defined frame rate Rate Control The rate control modes used by the encoder to decide how to restrict the datarate used e CBR constant bit rate e CBR Filler CBR plus padding for HRD compliance e VBR variable bit rate e VBR 2 pass When using the CBR the target bitrate will be treated as a maximum bit rate and will not be exceeded The bitrate specified will be constant over a period of time defined by the size of the buffer where the buffer is the target bitrate multiplied by the CBR delay in milliseconds
26. section to define the GOP Group of Picture GOP Size There are 3 ways to determine the GOP size e Fixed GOP size The interval between key frames or I Frames is fixed e Max GOP size with scene detection The interval between keyframes will not be greater than the value you set but may be smaller if a scene change is detected and an I frame is inserted 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 12 AVC for Web User s Manual AVC for Web e GOP size determined by scene detection Lirames will only be inserted by scene detection there is no maximum GOP size GOP IDR Control There are 3 ways to determine how IDR frames are used IDR frames instantaneous decoding refresh frames are I frames that are not referenced by any frames outside of the current GOP Non IDR I frames can be referenced by preceding B frames which can improve quality but can also reduce seeking precision e Open GOP This permits the use of all IDR frames excepting the first I frame e Closed GOP This ensures all I frames are IDR frames e Variable IDR Placement This ensures that an IDR frame is used periodically as defined by the Period by the user Number of B frames This is the number of successive B frames that may be present in a GOP This setting is not available for Baseline profile The default is 2 with no more than 4 recommended Adaptive number of B frames When this is e
27. ve file output You will normally only enable this option in the Muxer Metadata User specified metadata may be added to your files The metadata is added from an xml file For sample metadata xml files please refer to the Stream documents folder Add User Metadata Enable this if you want to add metadata to your file Metadata Filename Specify the xml file that contains the metadata you want to add to the file 2015 Imagine Communications Corp Proprietary and Confidential Page 22 AVC for Web User s Manual AVC for Web Chapters Chapters are used to define points in the file that can be used to navigate through the file and or to trigger events List of Chapters Add chapters by clicking the Add button and then specifying a title and Start time for the chapter If you do not specify a chapter at a start time of 0 then one will be set automatically with a blank title Chapters Language Code You may specify a language code for the Chapters using the 3 character ISO 639 2 T code Timed Text Subtitles Add Timed Text Track Enable this if you want to create a timed text track based on the text from an SRT file input Timed Text Filename Browse to the SRT file that you want to use to add the timed text track Timed Text language Code You may specify a language code for the Timed text using the 3 character ISO 639 2 T code QuickTime iTunes Closed Captions You can add a closed caption track when you use the QuickTim
28. vices Encode Mode e AAC This is the Low Complexity LC mode It is the oldest mode It requires higher data rates compared to the other encoding modes e AAC HE This is the High Efficiency HE mode Lower datarates will be available when you select this mode e AAC HE v 2 This is version 2 of the HE mode It adds the Parametric Stereo PS encoding which permits the lowest available datarates Metadata For making files for the web or for live streaming you will normally use the Disable Metadata option This prevents Dolby metadata from being written into the file 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 18 AVC for Web User s Manual AVC for Web Archive File Writer Configuration The Archive File Writer allows you to set the parameters for the MPEG 4 Muxer that is used to write archive files File Writer Container Parameter a Gs Video Audio Output format MPEG_4 Data ISO branding No Data2 Enable hinting No RTP packet size 1450 Alternate audio No Chunking mode Duration Chunking duration 1000 GOPs per chunk 0 Fragmented No Base data offset mode Implicit Fragment mode Duration Franament duration 1000 Output file extension mp4 The muxer will start with a default configuration of one Container that includes one Program with one Video and Audio track If you have added Subtitles you will also see Data track
29. with fast brightness changes such as a photoflash Output Filename Extension Enter the extension that will be used for elementary stream file output By default it is h264 2015 Imagine Communications Corp Proprietary and Confidential Error Unknown document property name Page 13 AVC for Web User s Manual AVC for Web GOP Settings Scene Detection Threshold Scene change detection is used to automatically insert an Lirame if a scene change is detected How much one frame has to change as compared to the next frame before the encoder determines that there has been a scene change is set by the detection threshold The threshold range is 1 to 100 with a default of 35 Setting this value too high may result in an underflow error particularly at low bitrates Rate Control Settings Buffer Length The buffer length in milliseconds is used to calculate the decoder buffer size where the buffer length multiplied by the target bitrate is the decoder buffer size The larger the buffer the more the instantaneous bit rate may fluctuate For CBR the default value is 1000 milliseconds For VBR the default value is 2000 milliseconds VBV Buffer Peak kbps This is the Video Buffer Verifier maximum size in kbps It is used by the rate control algorithm when using VBR rate control to ensure that a decoder that adheres to the HRD model will not underflow or overflow Initial CPB Removal Delay The Coded Picture Buffer CPB removal delay is
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