[FFmpeg-trac] #6375(ffmpeg:reopened): [bug][regression] Too many packets buffered for output stream

[FFmpeg]

#6375: [bug][regression] Too many packets buffered for output stream
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             Reporter:  p137        |                    Owner:
                 Type:  defect      |                   Status:  reopened
             Priority:  important   |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:  regression  |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
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Comment (by ObvB):

 Additional data point ... just in case it helps ...

 I was encountering this problem on a Raspberry Pi 2.


 {{{
 pi:~/ffmpeg_sources/ffmpeg-3.3$ ./ffmpeg -vcodec mpeg2_mmal -i CBS-
 Evening-News-With-Scott-Pelley.ts -f null -
 ffmpeg version 3.3 Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 4.9.2 (Raspbian 4.9.2-10)
   configuration: --disable-doc --disable-htmlpages --disable-manpages
 --disable-podpages --disable-txtpages --enable-mmal --enable-
 decoder=mpeg2_mmal --enable-decoder=mpeg4_mmal --enable-decoder=h264_mmal
   libavutil      55. 58.100 / 55. 58.100
   libavcodec     57. 89.100 / 57. 89.100
   libavformat    57. 71.100 / 57. 71.100
   libavdevice    57.  6.100 / 57.  6.100
   libavfilter     6. 82.100 /  6. 82.100
   libswscale      4.  6.100 /  4.  6.100
   libswresample   2.  7.100 /  2.  7.100
 Input #0, mpegts, from 'CBS-Evening-News-With-Scott-Pelley.ts':
   Duration: 00:30:00.50, start: 24953.710244, bitrate: 16569 kb/s
   Program 1
     Stream #0:0[0x31]: Video: mpeg2video ([2][0][0][0] / 0x0002),
 yuv420p(top first), 320x240, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
     Stream #0:1[0x34](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
 5.1(side), fltp, 384 kb/s
     Stream #0:2[0x35](spa): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
 mono, fltp, 128 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video (mpeg2_mmal) -> wrapped_avframe
 (native))
   Stream #0:1 -> #0:1 (ac3 (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 Too many packets buffered for output stream 0:1.
 Conversion failed!
 pi:~/ffmpeg_sources/ffmpeg-3.3$
 }}}


 When attempting to decode an HD ATSC broadcast TV .ts file made by
 tvheadend, using the decoder mpeg2_mmal, it failed with the message "Too
 many packets buffered for output stream"

 Decoding without specifying the mmal decoder worked.
 Decoding an SD (704x480) file worked with (and without) using decoder
 mpeg2_mmal
 ffmpeg 3.2.4 worked in all of the above cases.

 As a workaround, allocating more memory to the GPU worked. Setting
 gpu_mem=256 in /boot/config.txt "fixes" the problem in my case.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6375#comment:6>
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