Studio AVC for SelenioFlex™ Ingest
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1. 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 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 2015 Imagine Communications Corp Proprietary and Confidential Page 12 Studio AVC User s Manual Studio AVC Codec 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 Page 132. if you select custom timecode by using the value set in the Starting Timecode setting MBAFF scan type When using MBAFF encoding a flag will be added to indicate if the scan type of the source material is interlaced or progressive This setting is only enabled when Timecode mode is also enabled Split SEI payload By default this is disabled and all SEI payloads are put into a single SEI message for each Access Unit When this is enabled the SEI payload will be split into separate SEI messages SBS frame packing flag This flag is used when you are encoding 3D files that use side by side or top and bottom frame packing There are options for common NAL the SBS flag is included with other SEI messages or separate NAL the SBS flag is include in a separate NAL unit For CableLabs encoding the separate NAL mode needs to be used if other SEI messages are being used Note that when the Enable dual video file input for 3D option is enabled in the Media File Input on the main SelenioFlex Ingest interface this flag is read prior to encoding to determine which packing mode to use when creating the frames to be encoded In the encoded file this flag also provides information to the decoder about the frame packing mode that was used Multi Threading 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
3. 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 Studio AVC codec support levels 1 to 4 2 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 2015 Imagine Communications Corp Proprietary and Confidential Page 5 Studio AVC User s Manual Studio AVC Codec Level number Max video bit rate for Baseline and Main Profiles Max video bit rate for High Profile Examples for high resolution frame rate max stored frames in Level 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 352x238 15 2 6 1 3 768 kbit s 960 kbit s 320x240 36 0 7 352x238 30 0 6 2 Mbit s 2 5 Mbit s 320x240 36 0 7 352x238 30 0 6 2 1 2 2 4 Mbit s 4 Mbit s 5 Mbit s 5 Mbit s 352x430 30 0 7 352x576 25 0 6 352x480 30 7 10 352x576 25 6 7 720x430 15 0 6 720x576 12 5 5 10 Mbit s 12 5 Mbit s 352x480 61 4
4. settings Browse Browse Profile Name This is the name that will be used by the codec xml file 2015 Imagine Communications Corp Proprietary and Confidential Page 4 Studio AVC User s Manual Studio AVC Codec General Frame size the video image size in pixels Profile A profile limits the video encoding tools to a specific sub set of the available AVC encoding tools The Studio AVC codec support Baseline Main and High profiles 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 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 High High profile also known as the fidelity range extensions amendment introduces new coding tools 8x8 intra prediction transforms custom matrices amp lossless encoding It is intended for specific high end professional uses for example Bluray authoring Coding Tools Baseline Main High Error Resilience X and P Slices X X X 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
5. 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 AVC codec in SelenioFlex Ingest 3 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 2015 Imagine Communications Corp Proprietary and Confidential Page 11 Studio AVC User s Manual Studio AVC Codec SEI Messages Settings Picture timing flag Enables picture timing messages timestamps in output bitstream Note that this is normally required when using a hardware decoder such as a set top box to play back the video Timecode mode This can be enabled in order to preserve timecode from the video source in the H 264 elementary stream or
6. 12 352x576 51 1 10 720x430 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 20 Mbit s 25 Mbit s 1280x720 68 3 9 1920x1080 30 1 4 2048x1024 30 0 4 2015 Imagine Communications Corp Proprietary and Confidential Page 6 Studio AVC User s Manual Studio AVC Codec Level Max video bit rate for Max video bit rate Examples for high resolution frame number Baseline and Main Profiles for High Profile rate max stored frames in Level 1280x720 63 3 9 4 1 50 Mbit s 50 Mbit s 1920x1080 30 1 4 2048x1024 30 0 4 1920x1080 64 0 4 4 2 50 Mbit s 50 Mbit s 2048x1080 60 0 4 Interlace Mode Select the encoding mode you would like to use e Progressive frame based material e MBAFF top field first default for interlaced HD or PAL e MBAFF bottom field first default for NTSC e Interlace top field first used for interlaced footage when MBAFF cannot be decoded e Interlace bottom field first used for interlaced footage when MBAFF cannot be decoded Note that if you need to use interlaced mode instead of MBAFF because of limitations of your playback device then you will have to manually enter the mux rate when making a transport stream If you are using interlaced source video selecting Progressive will not dei
7. 5000ms then the minimum value of the initial CPB removal delay will be 5000ms 0 25 90kHz 112500 which is 1 125 sec Examples e For CBR mode default VBV length is 1000ms therefore the initial CPB removal delay equals to 90 1000 2 90000 sec 0 500 sec 2015 Imagine Communications Corp Proprietary and Confidential Page 10 Studio AVC User s Manual Studio AVC Codec e 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 Maximum reference frames Number of pictures frames or fields used for inter motion search where the higher the number the slower the search range 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
8. Imagine COMMUNICATIONS QW User s Manual Studio AVC for SelenioFlex Ingest February 2015 Delivering the Moment imaginecommunications com Studio AVC 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 tradema
9. e 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 2015 Imagine Communications Corp Proprietary and Confidential Page 9 Studio AVC User s Manual Studio AVC Codec 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 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 GOP Settings Scene detection threshold Scene change detection is used to auto
10. etween 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 e GOP size determined by scene detection I frames 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 2015 Imagine Communications Corp Proprietary and Confidential Page 8 Studio AVC User s Manual Studio AVC Codec Adaptive number of B frames When this is enabled 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 Closed Captioning Clo
11. matically insert an l frame 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 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
12. nterlace 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 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 CBR constant bit rate CBR Filler CBR plus padding for HRD compliance VBR variable bit rate 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 2015 Imagine Communications Corp Proprietary and Confidential Page 7 Studio AVC User s Manual Studio AVC Codec buffer is the target bitrate multiplied by the CBR delay in milliseconds 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 pla
13. reading Settings s ccsccdasesncccessaiecessasscccesssscdcesanccccesasiccdesauccdcessaecccasaaicccusahiicdesusicceseviacecasuiies 12 Fidelity Range Extension Settings ne tsent 12 VUI video usability information Settings cccescccccssssececssscececsesceesessesececsseeeeecsseseesessseeeecseeaeees 13 2015 Imagine Communications Corp Proprietary and Confidential Page 3 Studio AVC User s Manual Studio AVC Codec This AVC H 264 video codec can be used to create elementary stream video files or it can be used as a video codec in the Group Codec in a muxed file or as a live TS or RTP stream Video Settings Studio AVC Codec The codec opens with a window that covers the most common settings you will need when setting the AVC Profile Digital Rapids Studio AVC Profile a Profile Name General Frame size 720 x 480 Profile Main ly Level 3 2 x Interlace mode Progressive HD YGA Encoding CABAC VUI settings Framerate Custom m 29 97 video format NTSC Picture aspect ratio Custom D el 4 3 Rate control Mode CBR v Bitrate 2000 kbps Closed captioning GOP settings GOP size Max GOP size with scene detection EN Max key Frame interval seconds GOP IDR control Closed GOP wl Maximum B frames 2 Adaptive number of B Frames CC Source for 608 708 DT YCC From SCC file SCC file Field 1 SCC file Field 2 Advanced
14. rks of Microsoft Corporation All other trademarks and trade names are the property of their respective companies 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 Studio AVC User s Manual Contents Contents ee OC EE 4 te ET A Profile NaM EE 4 EINEN 5 Rate COMtrol isscevs eaieeu ege saadteuvanascas E ee ER Ge 7 VUI Video Usability Information Settings c ccccccssccesssscesecsssseeeesessececsesseceesesseeseseseeesssseseeseeseaeees 8 EL In dE 8 Closed ele e 9 Advanced Te dn 9 General d UTC 9 EELER eege Eege dtacaheceveneveuduesaseateubetes sea ceveateeeeusesuaveresteeee 10 Rate Control Settings annarai EOE ESA aaisuans SEA EE EEN 10 Motion E lenger 11 Rate Distortion Optimization Settings ccesssssssssscsssessssssseeeseseseseseeeseseeeeeseeeseaeaeseaeaeaeaeaeaeaeaaaeaes 11 eier IC 11 Loop Filter deblocking Setting 11 SEI Messages d TEE 12 Multi Th
15. sed captioning can be input from a variety of sources The captioning is preserved in the video elementary stream and can be decoded by hardware decoders that include 608 or 708 DTVCC decoders such as set top boxes Note that this is not the type of captioning that is typically decoded by software players If that is what you require please refer to the MPEG 4 Muxer used to make the MP4 files that are typically played by software players CC Source for 608 708 DTVCC From Video VBI or file either VBI line 21 the typical location of closed captioning for NTSC video or from the user data of an MPEG2 file From SCC file specify the SCC file to use as the source of the captions for field 1 and or field 2 e From DFXP file specify the DFXP file to use as the source of the captions e From SDI Ancillary data If your input is SDI then the ancillary data may carry 608 708 closed captioning This is the normal source for HD closed captions from tape If 608 and 708 closed captions exist in the source they will be preserved If only 608 closed captions exist in the source then the encoder will translate the 608 data to 708 data and preserve both the original 608 captions and the translated 708 captions 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 th
16. ying 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 in which case you will be able 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 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 b
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