Bug#819266: ffmpeg: rtmp is broken

[Carl Eugen Hoyos]

On Friday 25 March 2016 07:19:35 pm you wrote:
> Package: ffmpeg
> Version: 7:2.8.6-1+b2
> Severity: normal

> something about rtmp is broken in ffmpeg as shipped in Debian.
> For example, the Revision RTMP streams
> <https://2016.revision-party.net/live> do not work in either MPV or VLC.
> However, after building mpv and ffmpeg using mpv-build
> <https://github.com/mpv-player/mpv-build>, the streams *do* work -- and
> since MPV and VLC shows the same error, I suspect ffmpeg is the culprit
> here.

Sorry to say but this does not seem like a useful bug report: Did you test 
at all with FFmpeg?

> $ mpv 'rtmp://revision.scenesat.com/live/mainhall'

This url works fine here both with current FFmpeg and FFmpeg 2.8

Carl Eugen

$ ffmpeg -i rtmp://revision.scenesat.com/live/mainhall -qscale 2 out.avi
ffmpeg version N-79134-g4d25172 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      55. 19.100 / 55. 19.100
  libavcodec     57. 30.100 / 57. 30.100
  libavformat    57. 29.101 / 57. 29.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 40.102 /  6. 40.102
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
[flv @ 0x20ad3c0] audio stream discovered after head already parsed
Input #0, flv, from 'rtmp://revision.scenesat.com/live/mainhall':
  Metadata:
    author          :
    copyright       :
    description     :
    keywords        :
    rating          :
    title           :
    presetname      : Custom
    creationdate    : Fri Mar 25 21:25:32 2016
                    :
    videodevice     : AVerMedia HD Capture
    avclevel        : 32
    avcprofile      : 77
    videokeyframe_frequency: 5
    audiodevice     : AVerMedia HD Audio Cap (AVerMed
    audiochannels   : 2
    audioinputvolume: 75
  Duration: N/A, start: 0.000000, bitrate: 1328 kb/s
    Stream #0:0: Video: h264 (Main), yuv420p(tv), 960x540 [SAR 1:1 DAR 16:9], 
1200 kb/s, 30.30 fps, 29.97 tbr, 1k tbn, 60 tbc
    Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, avi, to 'out.avi':
  Metadata:
    author          :
    ICOP            :
    description     :
    keywords        :
    rating          :
    INAM            :
    presetname      : Custom
    creationdate    : Fri Mar 25 21:25:32 2016
                    :
    videodevice     : AVerMedia HD Capture
    avclevel        : 32
    avcprofile      : 77
    videokeyframe_frequency: 5
    audiodevice     : AVerMedia HD Audio Cap (AVerMed
    audiochannels   : 2
    audioinputvolume: 75
    ISFT            : Lavf57.29.101
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 960x540 [SAR 1:1 
DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
    Metadata:
      encoder         : Lavc57.30.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp, 192 
kb/s
    Metadata:
      encoder         : Lavc57.30.100 ac3
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
  Stream #0:1 -> #0:1 (mp3 (native) -> ac3 (native))
Press [q] to stop, [?] for help
frame=  606 fps= 31 q=2.0 Lsize=   10002kB time=00:00:20.58 
bitrate=3980.4kbits/s dup=0 drop=140 speed=1.06x
video:9481kB audio:482kB subtitle:0kB other streams:0kB global headers:0kB 
muxing overhead: 0.383157%