[FFmpeg-trac] #10813(ffmpeg:new): VP9 HLS encoding missing CODECS tag from playlist

[FFmpeg]

#10813: VP9 HLS encoding missing CODECS tag from playlist
---------------------------------+---------------------------------------
             Reporter:  alexpls  |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  ffmpeg   |                  Version:  unspecified
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+---------------------------------------
 When encoding a VP9 stream using the HLS segmenter, the CODECS tag does
 not appear within the HLS master playlist's #EXT-X-STREAM-INF.

 Here's an example command, and the playlist it produces:


 {{{
 ffmpeg \
   -i "Sintel_1080_10s_30MB.mp4" \
   -c:v libvpx-vp9 -b:v 2000k \
   -f hls \
   -movflags frag_keyframe \
   -hls_flags single_file \
   -hls_segment_type mpegts \
   -hls_list_size 0 \
   -hls_time 6 \
   -master_pl_name master.m3u8 \
   -y \
   encode/rendition_%v.m3u8
 }}}


 {{{
 #EXTM3U
 #EXT-X-VERSION:7
 #EXT-X-STREAM-INF:BANDWIDTH=2200000,RESOLUTION=1920x818
 rendition_0.m3u8
 }}}


 Compare this to the behaviour for H.264 codec, where the CODECS tag is
 included:


 {{{
 ffmpeg \
   -i "Sintel_1080_10s_30MB.mp4" \
   -c:v libx264 -b:v 2000k \
   -f hls \
   -movflags frag_keyframe \
   -hls_flags single_file \
   -hls_segment_type mpegts \
   -hls_list_size 0 \
   -hls_time 6 \
   -master_pl_name master.m3u8 \
   -y \
   encode/rendition_%v.m3u8
 }}}


 {{{
 #EXTM3U
 #EXT-X-VERSION:4
 #EXT-X-STREAM-
 INF:BANDWIDTH=2200000,RESOLUTION=1920x818,CODECS="avc1.640028"
 rendition_0.m3u8
 }}}

 This seems similar to https://trac.ffmpeg.org/ticket/8904

 I'm running ffmpeg version 6.1 on macOS Sonoma:


 {{{
 ffmpeg version 6.1 Copyright (c) 2000-2023 the FFmpeg developers
   built with Apple clang version 15.0.0 (clang-1500.1.0.2.5)
   configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.1-with-options_3
 --enable-shared --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic'
 --enable-gpl --enable-libaom --enable-libdav1d --enable-libmp3lame
 --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis
 --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig
 --enable-libfreetype --enable-frei0r --enable-libass --enable-demuxer=dash
 --enable-opencl --enable-audiotoolbox --enable-videotoolbox --enable-neon
 --disable-htmlpages --enable-libfdk-aac --enable-nonfree
 }}}

 Thanks!
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10813>
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