[FFmpeg-trac] #3662(undetermined:new): Corrupt media file causes ffmpeg to output confusing error messages about "options"

FFmpeg trac at avcodec.org
Thu May 22 14:38:46 CEST 2014 

#3662: Corrupt media file causes ffmpeg to output confusing error messages about
"options"
-------------------------------------+-------------------------------------
             Reporter:  b_jonas      |                     Type:  defect
               Status:  new          |                 Priority:  minor
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Dear ffmpeg team!

 This report demonstrates an example when reading a corrupt media file
 causes ffmpeg to output confusing error messages.  The media file is known
 to be wrong, you should not be able to play it.  However, ffmpeg outputs
 such error messages that suggest the error is in the command-line options
 I gave to ffmpeg.  In particular, notice the two lines

 > [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'pix_fmt' to
 value '-1'
 > [buffer @ 000000000051aa40] Unable to parse option

 value "-1" as pixel format
 which I thought would refer to the command-line options I gave.  Further,
 these messages are errors, not merely warnings (I'm sort of used to seeing
 warnings about color space or frame rate when reading jpeg files by now).

 To reproduce the problem, I have uploaded the file pix_fmt_unknown.mp4 to
 the ftp server "ftp://upload.ffmpeg.org/incoming".  I have tried to save
 the first frame of this video with the command line

 > ffmpeg -v 99 -report -i tmp/pix_fmt_unknown.mp4 -frames 1 -pix_fmt gray
 -y tmp/sampl0.png

 which gives the above mentioned error messages.  This has happened on
 Windows x86_64.  Below I reproduce the entire log file.


 ffmpeg started on 2014-05-22 at 14:25:56
 Report written to "ffmpeg-20140522-142556.log"
 Command line:
 "E:\\ambrus\\local\\ffmpeg-20140429-git-
 21c7e99-win64-shared\\bin\\ffmpeg.exe" -v 99 -report -i
 tmp/pix_fmt_unknown.mp4 -frames 1 -pix_fmt gray -y tmp/sampl0.png
 ffmpeg version N-62777-g21c7e99 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Apr 28 2014 22:12:47 with gcc 4.8.2 (GCC)
   configuration: --disable-static --enable-shared --enable-gpl --enable-
 version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-
 fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
 --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm
 --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
 libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
 libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-
 libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
   libavutil      52. 79.100 / 52. 79.100
   libavcodec     55. 59.101 / 55. 59.101
   libavformat    55. 37.101 / 55. 37.101
   libavdevice    55. 13.100 / 55. 13.100
   libavfilter     4.  4.100 /  4.  4.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
 Splitting the commandline.
 Reading option '-v' ... matched as option 'v' (set logging level) with
 argument '99'.
 Reading option '-report' ... matched as option 'report' (generate a
 report) with argument '1'.
 Reading option '-i' ... matched as input file with argument
 'tmp/pix_fmt_unknown.mp4'.
 Reading option '-frames' ... matched as option 'frames' (set the number of
 frames to record) with argument '1'.
 Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel
 format) with argument 'gray'.
 Reading option '-y' ... matched as option 'y' (overwrite output files)
 with argument '1'.
 Reading option 'tmp/sampl0.png' ... matched as output file.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option v (set logging level) with argument 99.
 Applying option report (generate a report) with argument 1.
 Applying option y (overwrite output files) with argument 1.
 Successfully parsed a group of options.
 Parsing a group of options: input file tmp/pix_fmt_unknown.mp4.
 Successfully parsed a group of options.
 Opening an input file: tmp/pix_fmt_unknown.mp4.
 [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052c480] Format
 mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052c480] ISO: File Type Major Brand:
 isom
 [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052c480] Before
 avformat_find_stream_info() pos: 1422165 bytes read:1454854 seeks:0
 [h264 @ 000000000063efc0] AVC: Consumed only 7831 bytes instead of 8812
 [h264 @ 000000000063efc0] Frame num gap 5 3
 [h264 @ 000000000063efc0] bytestream overread -7
 [h264 @ 000000000063efc0] error while decoding MB 64 57, bytestream -7
 [h264 @ 000000000063efc0] Cannot use next picture in error concealment
 [h264 @ 000000000063efc0] concealing 545 DC, 545 AC, 545 MV errors in P
 frame
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [h264 @ 000000000063efc0] AVC: nal size 0
 [h264 @ 000000000063efc0] no frame!
 [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052c480] decoding for stream 1 failed
 [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052c480] Could not find codec
 parameters for stream 0 (Video: h264 (avc1 / 0x31637661), 1280x1024,
 1/2000000): unspecified pixel format
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052c480] After
 avformat_find_stream_info() pos: 2151250 bytes read:2097153 seeks:1
 frames:61
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tmp/pix_fmt_unknown.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 0
     compatible_brands: mp41avc1qt
     creation_time   : 2014-05-17 08:22:35
     encoder         : vlc 2.1.3 stream output
     encoder-eng     : vlc 2.1.3 stream output
   Duration: 01:25:32.53, start: 0.000000, bitrate: 3 kb/s
     Stream #0:0(eng), 0, 1/1000000: Video: h264 (avc1 / 0x31637661),
 1280x1024, 1/2000000, 1000k tbr, 1000k tbn, 2000k tbc (default)
     Metadata:
       creation_time   : 2014-05-17 08:22:35
       handler_name    : VideoHandler
     Stream #0:1(eng), 61, 1/1000000: Video: h264 (Main) (avc1 /
 0x31637661), yuv420p(tv, bt470bg), 1280x1024, 1001/60000, 1747 kb/s, 25.01
 fps, 29.97 tbr, 1000k tbn, 59.94 tbc (default)
     Metadata:
       creation_time   : 2014-05-17 08:22:35
       handler_name    : VideoHandler
 Successfully opened the file.
 Parsing a group of options: output file tmp/sampl0.png.
 Applying option frames (set the number of frames to record) with argument
 1.
 Applying option pix_fmt (set pixel format) with argument gray.
 Successfully parsed a group of options.
 Opening an output file: tmp/sampl0.png.
 Successfully opened the file.
 detected 4 logical cores
 [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'video_size' to
 value '1280x1024'
 [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'pix_fmt' to
 value '-1'
 [buffer @ 000000000051aa40] Unable to parse option value "-1" as pixel
 format
 [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'time_base' to
 value '1/1000000'
 [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'pixel_aspect'
 to value '0/1'
 [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'sws_param' to
 value 'flags=2'
 [graph 0 input from stream 0:0 @ 000000000063be20] Setting 'frame_rate' to
 value '2000000/2'
 [buffer @ 000000000051aa40] Unable to parse option value "-1" as pixel
 format
 [buffer @ 000000000051aa40] Error setting option pix_fmt to value -1.
 [graph 0 input from stream 0:0 @ 000000000063be20] Error applying options
 to the filter.
 Error opening filters!
 [AVIOContext @ 0000000000534ae0] Statistics: 2097153 bytes read, 1 seeks
 Conversion failed!

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3662>
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