[FFmpeg-trac] #5000(undetermined:reopened): Skipping frames for GoPro videos recorder with Ambarella

[FFmpeg]

#5000: Skipping frames for GoPro videos recorder with Ambarella
-------------------------------------+-------------------------------------
             Reporter:  Den-ffmpeg   |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by cehoyos):

 I cannot reproduce an issue with the sample h264_gopro_ambarella.mp4
 Please test with current FFmpeg git head (not a month-old version) and
 provide command line including complete, uncut console output. Please do
 not use an external library (x264) if this is not necessary to reproduce
 the issue.
 {{{
 $ md5sum h264_gopro_ambarella.mp4
 b7bfb6524ae5cb74ac38f21ae8245c44  h264_gopro_ambarella.mp4
 $ ffmpeg -i h264_gopro_ambarella.mp4 -qscale 2 out.avi
 ffmpeg version N-77160-g9aebea0 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 10.100 / 55. 10.100
   libavcodec     57. 17.100 / 57. 17.100
   libavformat    57. 19.100 / 57. 19.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 20.100 /  6. 20.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'h264_gopro_ambarella.mp4':
   Metadata:
     major_brand     : avc1
     minor_version   : 0
     compatible_brands: avc1isom
     creation_time   : 2013-01-05 15:25:38
   Duration: 00:00:16.48, start: 0.000000, bitrate: 12270 kb/s
     Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p,
 1280x720 [SAR 1:1 DAR 16:9], 12126 kb/s, 59.94 fps, 59.94 tbr, 90k tbn,
 119.88 tbc (default)
     Metadata:
       creation_time   : 2013-01-05 15:25:38
       handler_name    :  Ambarella AVC
       encoder         : Ambarella AVC encoder
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 128 kb/s (default)
     Metadata:
       creation_time   : 2013-01-05 15:25:38
       handler_name    :  Ambarella AAC
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     major_brand     : avc1
     minor_version   : 0
     compatible_brands: avc1isom
     ISFT            : Lavf57.19.100
     Stream #0:0(eng): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x720
 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 59.94 fps, 59.94 tbn, 59.94 tbc
 (default)
     Metadata:
       creation_time   : 2013-01-05 15:25:38
       handler_name    :  Ambarella AVC
       encoder         : Lavc57.17.100 mpeg4
     Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo,
 fltp, 192 kb/s (default)
     Metadata:
       creation_time   : 2013-01-05 15:25:38
       handler_name    :  Ambarella AAC
       encoder         : Lavc57.17.100 ac3
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
   Stream #0:1 -> #0:1 (aac (native) -> ac3 (native))
 Press [q] to stop, [?] for help
 frame=  741 fps=284 q=2.0 Lsize=   31664kB time=00:00:16.48
 bitrate=15736.9kbits/s
 video:31233kB audio:386kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.143361%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5000#comment:12>
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