[FFmpeg-user] Use of tee output with codec copy

[Dennis Mungai]

On Thu, 26 Mar 2020 at 00:27, Devin Heitmueller <dheitmueller at kernellabs.com>
wrote:

> Hello,
>
> I've seen various postings related to problems with the use of copy with
> the tee output format, but not with any real resolution.  I'm trying to
> direct output to both an flv and a UDP output with codec copy, and I've
> boiled it down to the following test case (run against today's master).
>
> I originally assumed it was some failure to automatically insert a BSF when
> using the tee filter, but I don't see any sign of that.
>
> There's something in ffmpeg that converts "h264 (High) ([27][0][0][0]" into
> "h264 (High) ([7][0][0][0] / 0x0007)" when going directly to flv but not
> when using tee, but it's not clear to me where in the code that happens.
>
> Any suggestions would be greatly appreciated (I'm happy to provide the
> foo.ts file if you can't reproduce it with any other ts that has h.264 in
> it).
>
> Thanks,
>
> Devin Heitmueller
>
> =====
> ./ffmpeg -i foo.ts -map 0:0 -c:v copy -f tee "[f=mpegts]udp://
> 227.1.1.1:6002?pkt_size=1316|[f=flv]whatever.flv
> <http://227.1.1.1:6002?pkt_size=1316%7C[f=flv]whatever.flv>"
> ffmpeg version N-96891-g60b1f85b67 Copyright (c) 2000-2020 the FFmpeg
> developers
>   built with Apple clang version 11.0.0 (clang-1100.0.33.17)
>   configuration:
>   libavutil      56. 42.100 / 56. 42.100
>   libavcodec     58. 73.102 / 58. 73.102
>   libavformat    58. 39.101 / 58. 39.101
>   libavdevice    58.  9.103 / 58.  9.103
>   libavfilter     7. 77.100 /  7. 77.100
>   libswscale      5.  6.100 /  5.  6.100
>   libswresample   3.  6.100 /  3.  6.100
> Input #0, mpegts, from 'foo.ts':
>   Duration: 00:00:23.90, start: 1.400000, bitrate: 2531 kb/s
>   Program 1
>     Metadata:
>       service_name    : Service01
>       service_provider: FFmpeg
>     Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B),
> yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps,
> 29.97 tbr, 90k tbn, 59.94 tbc
>     Stream #0:1[0x101]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
> stereo, fltp, 256 kb/s
> [flv @ 0x7fe45a804c00] Tag [27][0][0][0] incompatible with output codec id
> '27' ([7][0][0][0])
> [tee @ 0x7fe45a802200] Slave '[f=flv]whatever.flv': error writing header:
> Invalid data found when processing input
> [tee @ 0x7fe45a802200] Slave muxer #1 failed, aborting.
> Could not write header for output file #0 (incorrect codec parameters ?):
> Invalid data found when processing input
> Stream mapping:
>   Stream #0:0 -> #0:0 (copy)
>     Last message repeated 1 times
> ===================
>
> For reference, this command works fine:
> ./ffmpeg -i foo.ts -map 0:0 -c:v copy -f flv whatever.flv
>
>
> --
> Devin J. Heitmueller - Kernel Labs
>
>
Hey there,

Could you provide the sample file mentioned in the issue above?