Not possible to override bogus FPS in raw h264 streams

[jaanusk]

It's not possible to override fps on raw h264 streams.

For example, I have a stream produced by Raspberry PI HW encoder which plays fine when fps
is forced. The actual fps is 15, but recent ffmpeg versions default somehow to 25fps.

How to reproduce:

% ffmpeg -r 15 -i stream_00 -vcodec copy stream.mp4
ffmpeg version N-49440-gebe368d Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 29 2013 16:08:08 with gcc 4.7 (Debian 4.7.2-5)
  configuration: 
  libavutil      52. 17.100 / 52. 17.100
  libavcodec     54. 91.100 / 54. 91.100
  libavformat    54. 61.104 / 54. 61.104
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 34.101 /  3. 34.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
[h264 @ 0x1bcf000] max_analyze_duration 5000000 reached at 5000000 microseconds
[h264 @ 0x1bcf000] Estimating duration from bitrate, this may be inaccurate
Input #0, h264, from 'stream_00':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p, 960x720, 25 fps, 25 tbr, 1200k tbn, 50 tbc
Output #0, mp4, to 'stream.mp4':
  Metadata:
    encoder         : Lavf54.61.104
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 960x720, q=2-31, 25 fps, 1200k tbn, 1200k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=224753 fps=173017 q=-1.0 Lsize=  103295kB time=02:29:50.08 bitrate=  94.1kbits/s    
video:102400kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.873958%

Output file plays faster then normal because the actual source is 15fps and ffmpeg does not allow to override this.

Last version that works as expected is 0.11.2.

[Carl Eugen Hoyos]

Replying to jaanusk:

Last version that works as expected is 0.11.2.

This is unexpected: Please provide command line including complete, uncut console output for a working revision and provide an input sample.

[jaanusk]

Working example:

$ ffmpeg -r 15 -i sample.h264 -vcodec copy out.mp4
ffmpeg version 0.11.2 Copyright (c) 2000-2012 the FFmpeg developers
  built on Jan 23 2013 11:04:28 with gcc 4.4.5
  configuration: 
  libavutil      51. 54.100 / 51. 54.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.100 / 54.  6.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
[h264 @ 0x1e459160] max_analyze_duration 5000000 reached at 5000000
[h264 @ 0x1e459160] Estimating duration from bitrate, this may be inaccurate                                                              
Input #0, h264, from 'sample.h264':                                                                                                       
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p, 960x720, 15 fps, 15 tbr, 1200k tbn, 30 tbc
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf54.6.100
    Stream #0:0: Video: h264 (![0][0][0] / 0x0021), yuv420p, 960x720, q=2-31, 15 fps, 1200k tbn, 1200k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=  140 fps=0.0 q=-1.0 Lsize=     202kB time=00:00:09.26 bitrate= 178.8kbits/s    
video:200kB audio:0kB global headers:0kB muxing overhead 1.108398%

[jaanusk]

Raw h264 file from Raspberry Pi encoder, 15fps

[Carl Eugen Hoyos]

Ticket #2276 is probably a duplicate of this ticket.

[Michael Niedermayer]

Fixed in 356363c89830585b0a1476ccc16d79158260617c

[jaanusk]

Broken in 1.2.3 and 2.0.1:

$ ffmpeg -r 15 -i sample.h264 -vcodec copy out.mp4
ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers
  built on Sep 26 2013 12:24:48 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --enable-libx264 --enable-gpl
  libavutil      52. 38.100 / 52. 38.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.100 / 55. 12.100
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 79.101 /  3. 79.101
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
Input #0, h264, from 'sample.h264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p, 960x720, 25 fps, 25 tbr, 1200k tbn, 50 tbc
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf55.12.100
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 960x720, q=2-31, 25 fps, 15360 tbn, 15 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=  140 fps=0.0 q=-1.0 Lsize=     201kB time=00:00:09.33 bitrate= 176.7kbits/s    
video:200kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.675293% 

[Carl Eugen Hoyos]

Please test current git head.

[jaanusk]

git head also broken:

$ /usr/local/bin/ffmpeg -r 15 -i sample.h264 -vcodec copy out.mp4
ffmpeg version N-56677-g689a1bd Copyright (c) 2000-2013 the FFmpeg developers
  built on Sep 27 2013 07:16:18 with gcc 4.8.1 (GCC) 20130603 (Red Hat 4.8.1-1)
  configuration: --enable-libx264 --enable-gpl
  libavutil      52. 46.100 / 52. 46.100
  libavcodec     55. 33.100 / 55. 33.100
  libavformat    55. 18.103 / 55. 18.103
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 87.100 /  3. 87.100
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, h264, from 'sample.h264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p, 960x720, 25 fps, 25 tbr, 1200k tbn, 50 tbc
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf55.18.103
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 960x720, q=2-31, 25 fps, 15360 tbn, 15 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=  140 fps=0.0 q=-1.0 Lsize=     201kB time=00:00:09.33 bitrate= 176.7kbits/s    
video:200kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.675293%

[Carl Eugen Hoyos]

I tested your sample and command line the other day and it appeared to me that out.mp4 is created with the the intended 15fps. Which application do you use for testing / how does ffplay play the output file for you?

[jaanusk]

Replying to cehoyos:

I tested your sample and command line the other day and it appeared to me that out.mp4 is created with the the intended 15fps. Which application do you use for testing / how does ffplay play the output file for you?

Indeed, mplayer shows the actual produced file to be 15fps.

Text output is still misleading "25 fps" though.

[Carl Eugen Hoyos]

Afaict, this was a regression which was fixed by Michael. If you believe that the console output is misleading, please open a new ticket.