[FFmpeg-trac] #1581(FFmpeg:new): No video, when broadcasting via rtmp

[FFmpeg]

#1581: No video, when broadcasting via rtmp
-------------------------------------+-------------------------------------
             Reporter:  vitrums      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  FFmpeg       |                  Version:
             Keywords:  rtmp justin  |  unspecified
  own3d broadcast                    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 == Summary of the bug ==

 RTMP videocasting services such as justin.tv or own3d.tv show LIVE status,
 when broadcasting via FFmpeg, though no video, but a black screen.

 == How to reproduce ==

 ''Shell script example:''

 INRES="1920x1080"
 OUTRES="1920x1080"
 FPS="30"
 QUAL="ultrafast"

 STREAM_KEY="YourStreamKeyTypeHere"
 URL="rtmp://live.eu.own3d.tv/live/$STREAM_KEY"

 ffmpeg -f x11grab -y -s "$INRES" -r "$FPS" -i :0.0 -an \
     -vcodec libx264 -preset "$QUAL" -crf 30 -s "$OUTRES" -b:v 1500k \
     -f flv "$URL"

 ''Here is the output:''

 --- BEGINNING OF THE LOG ---

 vitrums at vitrums:~/stream$ ffmpeg version git-2012-07-28-a2f91e7 Copyright
 (c) 2000-2012 the FFmpeg developers
   built on Jul 28 2012 12:01:28 with gcc 4.6 (Ubuntu/Linaro
 4.6.3-1ubuntu5)
   configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp
 --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-nonfree --enable-version3 --enable-x11grab
   libavutil      51. 65.100 / 51. 65.100
   libavcodec     54. 45.100 / 54. 45.100
   libavformat    54. 21.100 / 54. 21.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  3.100 /  3.  3.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [x11grab @ 0x36d9440] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1920
 height: 1080
 [x11grab @ 0x36d9440] shared memory extension found
 [x11grab @ 0x36d9440] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, x11grab, from ':0.0':
   Duration: N/A, start: 1343479201.360353, bitrate: 1990656 kb/s
     Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080,
 1990656 kb/s, 30 tbr, 1000k tbn, 30 tbc
 [libx264 @ 0x36e6b40] using cpu capabilities: MMX2 SSE2Fast SSSE3
 FastShuffle SSE4.2 AVX
 [libx264 @ 0x36e6b40] profile High 4:4:4 Predictive, level 4.0, 4:4:4
 8-bit
 [libx264 @ 0x36e6b40] 264 - core 125 r2 d9d2288 - H.264/MPEG-4 AVC codec -
 Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=0
 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00
 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0
 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=6
 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250
 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=30.0
 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
 Output #0, flv, to 'rtmp://live.eu.own3d.tv/live/HIDDEN':
   Metadata:
     encoder         : Lavf54.21.100
     Stream #0:0: Video: h264 ([7][0][0][0] / 0x0007), yuv444p, 1920x1080,
 q=-1--1, 1500 kb/s, 1k tbn, 30 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo -> libx264)
 Press [q] to stop, [?] for help
 frame=  231 fps= 24 q=32766.0 Lsize=     977kB time=00:00:07.70
 bitrate=1039.8kbits/s
 video:973kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 0.491404%
 [libx264 @ 0x36e6b40] frame I:1     Avg QP:27.00  size:268629
 [libx264 @ 0x36e6b40] frame P:230   Avg QP:20.46  size:  3159
 [libx264 @ 0x36e6b40] mb I  I16..4: 100.0%  0.0%  0.0%
 [libx264 @ 0x36e6b40] mb P  I16..4:  0.3%  0.0%  0.0%  P16..4:  1.4%  0.0%
 0.0%  0.0%  0.0%    skip:98.2%
 [libx264 @ 0x36e6b40] coded y,u,v intra: 32.4% 14.7% 14.1% inter: 0.7%
 0.3% 0.3%
 [libx264 @ 0x36e6b40] i16 v,h,dc,p: 62% 31%  5%  2%
 [libx264 @ 0x36e6b40] kb/s:1034.06

 --- END OF THE LOG ---

 AFAIK, the log is fine and no crashes were reported.

 However if we run the same command with the output method set as: -f flv
 out.lfv, the locally recorded video would be just fine. We may actually
 try to send it via rtmp using the following command:

 ffmpeg -re -i out.flv -c copy -f flv "$URL"

 which would again, give the same result, as if the video was grabbed
 directly via x11grab. The video is still blank.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1581>
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