[FFmpeg-trac] #10037(ffmpeg:new): EXT-X-STREAM-INF is missing CODECS attribute when using h264_v4l2m2m encoder

[FFmpeg]

#10037: EXT-X-STREAM-INF is missing CODECS attribute when using h264_v4l2m2m
encoder
------------------------------------+----------------------------------
             Reporter:  nls         |                     Type:  defect
               Status:  new         |                 Priority:  normal
            Component:  ffmpeg      |                  Version:  5.1.2
             Keywords:  ffmpeg HLS  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+----------------------------------
 Summary of the bug:

 Trying to encode for HLS live stream using ffmpeg on a Raspberry Pi 4.
 Everything is working but the EXT-X-STREAM-INF is missing the CODECS
 attribute that's present for other h264 encoders like libx264 or the old
 OMX encoder. We don't use audio in these streams. This makes the stream
 break in Chrome, because it assumes an audio track when the CODECS attrib
 is missing.

 A possible cause is the v4l2 driver's inability to take the -profile
 parameter, so it must be omitted from the command line. This might affect
 the logic for adding the attribute (a wild guess).

 How to reproduce:
 {{{
 Command:
 ffmpeg-new -f v4l2 -thread_queue_size 1024 -input_format yuyv422 -r 30
 -video_size 1280x720 -i /dev/video0 -filter:v scale=1024:576 -f hls
 -hls_playlist_type event -hls_segment_filename
 http://localhost:3000/upload/segment_04_%06d.ts -master_pl_name
 master_04.m3u8 -hls_time 6 -c:v h264_v4l2m2m -level:v 4.2 -b:v 2000k
 -pix_fmt yuv420p -threads 4 -maxrate 1500k -force_key_frames
 expr:gte(t,n_forced*6) -keyint_min 30 -ss 1 -movflags faststart -headers
 content-type: application/octet-stream?  -method POST
 http://localhost:3000/upload/stream_04.m3u8

 ffmpeg output:

 ffmpeg version 5.1.1-static https://johnvansickle.com/ffmpeg/  Copyright
 (c) 2000-2022 the FFmpeg developers
   built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
   configuration: --enable-gpl --enable-version3 --enable-static --disable-
 debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
 --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp
 --enable-libgme --enable-gray --enable-libfribidi --enable-libass
 --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-librubberband --enable-libsoxr
 --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus
 --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-
 libvpx --enable-libwebp --enable-libx264 --enable-libxml2 --enable-libxvid
 --enable-libzimg
   libavutil      57. 28.100 / 57. 28.100
   libavcodec     59. 37.100 / 59. 37.100
   libavformat    59. 27.100 / 59. 27.100
   libavdevice    59.  7.100 / 59.  7.100
   libavfilter     8. 44.100 /  8. 44.100
   libswscale      6.  7.100 /  6.  7.100
   libswresample   4.  7.100 /  4.  7.100
   libpostproc    56.  6.100 / 56.  6.100
 [video4linux2,v4l2 @ 0x4229a60] Dequeued v4l2 buffer contains corrupted
 data (0 bytes).
 Input #0, video4linux2,v4l2, from '/dev/video0':
   Duration: N/A, start: 0.000000, bitrate: 442368 kb/s
   Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720,
 442368 kb/s, 30 fps, 30 tbr, 1000k tbn
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_v4l2m2m))
 Press [q] to stop, [?] for help
 [video4linux2,v4l2 @ 0x4229a60] Dequeued v4l2 buffer contains corrupted
 data (0 bytes).
     Last message repeated 30 times
 [h264_v4l2m2m @ 0x422dff0] Using device /dev/video11
 [h264_v4l2m2m @ 0x422dff0] driver 'bcm2835-codec' on card 'bcm2835-codec-
 encode' in mplane mode
 [h264_v4l2m2m @ 0x422dff0] requesting formats: output=YU12 capture=H264
 [h264_v4l2m2m @ 0x422dff0] Failed to set gop size: Invalid argument
 Output #0, hls, to 'http://localhost:3000/upload/stream_04.m3u8':
   Metadata:
     encoder         : Lavf59.27.100
   Stream #0:0: Video: h264, yuv420p(tv, progressive), 1024x576, q=2-31,
 1500 kb/s, 15 fps, 90k tbn
     Metadata:
       encoder         : Lavc59.37.100 h264_v4l2m2m
 [hls @ 0x422b220] Opening
 'http://localhost:3000/upload/segment_04_000000.ts' for writing
 [hls @ 0x422b220] Opening 'http://localhost:3000/upload/master_04.m3u8'
 for writing
 [hls @ 0x422b220] Opening
 'http://localhost:3000/upload/segment_04_000001.ts' for writing
 frame=  149 fps= 29 q=-0.0 Lsize=N/A time=00:00:10.00 bitrate=N/A
 speed=0.891x
 video:910kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 Exiting normally, received signal 2.
 }}}

 Correct master manifest:
 {{{
 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-STREAM-
 INF:BANDWIDTH=1320000,RESOLUTION=1024x576,CODECS="avc1.64002a"
 stream_04.m3u8
 }}}

 Incorrect master manifest:
 {{{
 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-STREAM-INF:BANDWIDTH=1650000,RESOLUTION=1024x576
 stream_04.m3u8
 }}}

 Environment:
 {{{
 OS: Debian 11.5 (Raspberry OS)
 Kernel: 5.15.61-v7l+
 ffpmeg 5.1.1 static from https://johnvansickle.com/ffmpeg/
 }}}

 The 20220910 build from https://johnvansickle.com/ffmpeg/ exhibits the
 same issue (can't use that because of another bug).
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10037>
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