[FFmpeg-devel] parse mkv file wrong problem

[Steven Liu]

Hi all,

      When i transcode the mkv file like this:
       http://blog.fs-linux.org/Hotcha.mkv
      It give the message bellow:

      [matroska,webm @ 0x3207240] Format matroska,webm probed with
size=2048 and score=100
st:0 removing common factor 500000 from timebase
st:1 removing common factor 500000 from timebase
st:2 removing common factor 500000 from timebase
st:3 removing common factor 500000 from timebase
[matroska,webm @ 0x3207240] File position before
avformat_find_stream_info() is 5965
[matroska,webm @ 0x3207240] max_analyze_duration 5000000 reached at 5000000
[matroska,webm @ 0x3207240] Could not find codec parameters for stream
2 (Video: h264 (H264 / 0x34363248), 1920x1080, 1/4000): unspecified
pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[matroska,webm @ 0x3207240] File position after
avformat_find_stream_info() is 1981448
Input #0, matroska,webm, from 'Hotcha.mkv':
  Duration: 00:04:05.89, start: 0.000000, bitrate: 5621 kb/s
    Stream #0:0(eng), 125, 1/2000: Video: h264 (High) (H264 /
0x34363248), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1/50, 25 fps, 25
tbr, 2k tbn, 50 tbc (default)
    Metadata:
      BPS             : 5513740
      BITSPS          : 5513740
      FPS             : 24.9981
    Stream #0:1, 218, 1/2000: Audio: aac, 44100 Hz, stereo, s16 (default)
    Metadata:
      FPS             : 43.0665
      BPS             : 103356
      BITSPS          : 103356
    Stream #0:2(eng), 0, 1/2000: Video: h264 (H264 / 0x34363248),
1920x1080, 1/4000, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2k tbn, 4k tbc
(default)
    Metadata:
      BPS             : 5513740
      BITSPS          : 5513740
      FPS             : 24.9981
    Stream #0:3, 0, 1/2000: Audio: aac, 44100 Hz, stereo, s16 (default)
    Metadata:
      FPS             : 43.0665
      BPS             : 103356
      BITSPS          : 103356
[graph 0 input from stream 0:0 @ 0x3351d80]Steven
Print==args=|video_size=1920x1080:pix_fmt=0:time_base=1/2000:pixel_aspect=1/1:sws_param=flags=2:frame_rate=25/1|
[buffer @ 0x3326d40] Setting entry with key 'video_size' to value '1920x1080'
[buffer @ 0x3326d40] Setting entry with key 'pix_fmt' to value '0'
[buffer @ 0x3326d40] Setting entry with key 'time_base' to value '1/2000'
[buffer @ 0x3326d40] Setting entry with key 'pixel_aspect' to value '1/1'
[buffer @ 0x3326d40] Setting entry with key 'sws_param' to value 'flags=2'
[buffer @ 0x3326d40] Setting entry with key 'frame_rate' to value '25/1'
[graph 0 input from stream 0:0 @ 0x3351d80] w:1920 h:1080
pixfmt:yuv420p tb:1/2000 fr:25/1 sar:1/1 sws_param:flags=2
[abuffer @ 0x3313c60] Setting entry with key 'time_base' to value '1/44100'
[abuffer @ 0x3313c60] Setting entry with key 'sample_rate' to value '44100'
[abuffer @ 0x3313c60] Setting entry with key 'sample_fmt' to value 's16'
[abuffer @ 0x3313c60] Setting entry with key 'channel_layout' to value '0x3'
[graph 1 input from stream 0:1 @ 0x32c18e0] tb:1/44100 samplefmt:s16
samplerate:44100 chlayout:0x3
-async is forwarded to lavfi similarly to -af
aresample=min_comp=0.001:min_hard_comp=0.100000.
[aformat @ 0x33262c0] Setting entry with key 'sample_fmts' to value 'fltp'
[aformat @ 0x33262c0] Setting entry with key 'sample_rates' to value '44100'
[graph 1 aresample for input stream 0:1 @ 0x3308ba0] chl:stereo
fmt:s16 r:44100Hz -> chl:stereo fmt:fltp r:44100Hz
[graph 2 input from stream 0:2 @ 0x3313be0] Steven Print
==args=|video_size=1920x1080:pix_fmt=-1:time_base=1/2000:pixel_aspect=1/1:sws_param=flags=2:frame_rate=25/1|
[buffer @ 0x3312580] Setting entry with key 'video_size' to value '1920x1080'
[buffer @ 0x3312580] Setting entry with key 'pix_fmt' to value '-1'
[buffer @ 0x3312580] Unable to parse option value "-1" as pixel format



Perhaps the error was at demux the mkv file,

Michael,

       Is this a BUG?



Best regards