[FFmpeg-trac] #3629(avformat:new): Remuxing 25 fps single frame file to nut container seemingly results in a frame rate of 52000 FPS

[FFmpeg]

#3629: Remuxing 25 fps single frame file to nut container seemingly results in a
frame rate of 52000 FPS
----------------------------------+---------------------------------------
             Reporter:  rmk       |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  unspecified
             Keywords:  NUT       |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+---------------------------------------
 See command lines and output. The resulting file is reported by both
 ffmpeg and ffprobe as having 52000 fps (if I interprete it correctly) and
 not as the input file as 25 fps.

 ffmpeg -i black_frame_full_hd_ffv1_yuv444p.mov -c copy -y out.nut
 ffmpeg version N-62704-g92cc6d5 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on May  6 2014 17:19:30 with Apple LLVM version 5.1
 (clang-503.0.40) (based on LLVM 3.4svn)
   configuration: --enable-gpl
   libavutil      52. 78.100 / 52. 78.100
   libavcodec     55. 59.100 / 55. 59.100
   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
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
 'black_frame_full_hd_ffv1_yuv444p.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     encoder         : Lavf55.24.100
   Duration: 00:00:00.04, start: 0.000000, bitrate: 630 kb/s
     Stream #0:0(eng): Video: ffv1 (FFV1 / 0x31564646), yuv444p, 1920x1080,
 472 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
     Metadata:
       handler_name    : DataHandler
 Output #0, nut, to 'out.nut':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     encoder         : Lavf55.37.101
     Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv444p, 1920x1080,
 q=2-31, 472 kb/s, 25 fps, 51200 tbn, 12800 tbc (default)
     Metadata:
       X-Language      : eng
       handler_name    : DataHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 frame=    1 fps=0.0 q=-1.0 Lsize=       3kB time=00:00:00.00
 bitrate=286256.4kbits/s
 video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 18.262712%

 ffprobe -i out.nut -show_streams
 ffprobe version N-62704-g92cc6d5 Copyright (c) 2007-2014 the FFmpeg
 developers
   built on May  6 2014 17:19:30 with Apple LLVM version 5.1
 (clang-503.0.40) (based on LLVM 3.4svn)
   configuration: --enable-gpl
   libavutil      52. 78.100 / 52. 78.100
   libavcodec     55. 59.100 / 55. 59.100
   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
 Input #0, nut, from 'out.nut':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     encoder         : Lavf55.37.101
   Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
     Stream #0:0(eng): Video: ffv1 (FFV1 / 0x31564646), yuv444p, 1920x1080,
 51200 tbr, 51200 tbn, 51200 tbc (default)
     Metadata:
       handler_name    : DataHandler
 [STREAM]
 index=0
 codec_name=ffv1
 codec_long_name=FFmpeg video codec #1
 profile=unknown
 codec_type=video
 codec_time_base=1/51200
 codec_tag_string=FFV1
 codec_tag=0x31564646
 width=1920
 height=1080
 has_b_frames=0
 sample_aspect_ratio=0:1
 display_aspect_ratio=0:1
 pix_fmt=yuv444p
 level=-99
 timecode=N/A
 id=N/A
 r_frame_rate=51200/1
 avg_frame_rate=0/0
 time_base=1/51200
 start_pts=0
 start_time=0.000000
 duration_ts=N/A
 duration=N/A
 bit_rate=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 DISPOSITION:default=1
 DISPOSITION:dub=0
 DISPOSITION:original=0
 DISPOSITION:comment=0
 DISPOSITION:lyrics=0
 DISPOSITION:karaoke=0
 DISPOSITION:forced=0
 DISPOSITION:hearing_impaired=0
 DISPOSITION:visual_impaired=0
 DISPOSITION:clean_effects=0
 DISPOSITION:attached_pic=0
 TAG:language=eng
 TAG:handler_name=DataHandler
 [/STREAM]

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Ticket URL: <https://trac.ffmpeg.org/ticket/3629>
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