[FFmpeg-trac] #4759(ffmpeg:new): Transcoding continues with unfilled video packet

[FFmpeg]

#4759: Transcoding continues with unfilled video packet
--------------------------------+--------------------------------------
             Reporter:  t.rapp  |                     Type:  defect
               Status:  new     |                 Priority:  normal
            Component:  ffmpeg  |                  Version:  git-master
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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 When I try to transcode a loss-less input file to MXF/IMX30 having the
 "-xerror" command-line option set the transcoding continues even in cases
 when the video packet is not complete. Apparently the error is detected as
 the debug log output contains the following messages:
 {{{
 [mpeg2video @ 0x32e7f60] rc buffer underflow
 [mxf_d10 @ 0x32e6d00] cannot fill d-10 video packet
 }}}
 but the error is not propagated.

 How to reproduce:
 {{{
 % ./ffmpeg -f rawvideo -video_size pal -pixel_format yuv420p \
  -framerate 25 -i /dev/urandom  -f mxf_d10 -c:v mpeg2video \
  -pix_fmt yuv422p -b:v 30000k -minrate 30000k -maxrate 30000k \
  -g 1 -flags +ildct+low_delay -intra_vlc 1 -non_linear_quant 1 \
  -ps 1 -qmin 1 -qmax 12 -dc 10 -bufsize 1200000 \
  -rc_init_occupancy 1200000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 \
  -t 1 -y ffmpeg-imx30-test01.mxf -xerror

 ffmpeg version N-74305-g94c0df7 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
   configuration: --cc='ccache gcc' --enable-debug --disable-optimizations
 --enable-version3 --enable-sdl
   libavutil      54. 30.100 / 54. 30.100
   libavcodec     56. 57.100 / 56. 57.100
   libavformat    56. 40.101 / 56. 40.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 32.100 /  5. 32.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.101 /  1.  2.101
 Input #0, rawvideo, from '/dev/urandom':
   Duration: N/A, start: 0.000000, bitrate: 124416 kb/s
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x576,
 124416 kb/s, 25 tbr, 25 tbn, 25 tbc
 Output #0, mxf_d10, to 'ffmpeg-imx30-test01.mxf':
   Metadata:
     encoder         : Lavf56.40.101
     Stream #0:0: Video: mpeg2video, yuv422p, 720x576, q=1-12, 30000 kb/s,
 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc56.57.100 mpeg2video
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native))
 Press [q] to stop, [?] for help
 [swscaler @ 0x32d3840] Warning: data is not aligned! This can lead to a
 speedloss
 [mpeg2video @ 0x32e7f60] rc buffer underflow
 [mxf_d10 @ 0x32e6d00] cannot fill d-10 video packet
 [mpeg2video @ 0x32e7f60] rc buffer underflow
 [mxf_d10 @ 0x32e6d00] cannot fill d-10 video packet
 [mpeg2video @ 0x32e7f60] rc buffer underflow
 [mxf_d10 @ 0x32e6d00] cannot fill d-10 video packet
 [mpeg2video @ 0x32e7f60] rc buffer underflow
 [mxf_d10 @ 0x32e6d00] cannot fill d-10 video packet
 ...
 [mpeg2video @ 0x32e7f60] rc buffer underflow
 [mxf_d10 @ 0x32e6d00] cannot fill d-10 video packet
 frame=   25 fps=1.9 q=31.1 Lsize=    4510kB time=00:00:01.00
 bitrate=36942.2kbits/s
 video:4484kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.570479%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4759>
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