Pasteur changes the fps (mpegts->mp4)

[Atarikid]

Here is an odd issue when using video and audio passthru.
The source file is a MPS container with h264 video and AC3 audio

When using -c:v copy -c:a copy to a MP4 container the result is 59,97fps instead of 29,97fps
When doing the same to a MKV container it works as expected.

Xtophes-MacBook-Pro:~ xtophe$ /Users/xtophe/Desktop/ffmpeg -i /Users/xtophe/Desktop/passthruissue.MTS -c:v copy -c:a copy /Users/xtophe/Desktop/passthruissue.mp4
ffmpeg version 2.6.1 Copyright (c) 2000-2015 the FFmpeg developers

built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
configuration: --prefix=/Volumes/tempdisk/sw --as=yasm --enable-gpl --enable-pthreads --disable-ffplay --disable-ffserver --disable-shared --enable-static --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-avfilter --enable-fontconfig --enable-libfreetype --enable-libass --enable-libutvideo --enable-filters --enable-postproc --enable-runtime-cpudetect
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100

Input #0, mpegts, from '/Users/xtophe/Desktop/passthruissue.MTS':

Duration: 00:00:05.54, start: 0.492322, bitrate: 15040 kb/s
Program 1

Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s

[mp4 @ 0x7f97d381c800] track 1: codec frame size is not set
Output #0, mp4, to '/Users/xtophe/Desktop/passthruissue.mp4':

Metadata:

encoder : Lavf56.25.101
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 90k tbn, 90k tbc
Stream #0:1: Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, stereo, 256 kb/s

Stream mapping:

Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)

Press [q] to stop, ? for help
[mp4 @ 0x7f97d381c800] pts has no value

Last message repeated 164 times

frame= 330 fps=0.0 q=-1.0 Lsize= 9662kB time=00:00:05.53 bitrate=14297.5kbits/s
video:9481kB audio:173kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.080256%

Here is the output of the encoded pasteurise.mp4 file
As you can see the framerate is now 59.94fps instead of 29,97fps

Xtophes-MacBook-Pro:~ xtophe$ /Users/xtophe/Desktop/ffmpeg -i /Users/xtophe/Desktop/passthruissue.mp4
ffmpeg version 2.6.1 Copyright (c) 2000-2015 the FFmpeg developers

built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
configuration: --prefix=/Volumes/tempdisk/sw --as=yasm --enable-gpl --enable-pthreads --disable-ffplay --disable-ffserver --disable-shared --enable-static --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-avfilter --enable-fontconfig --enable-libfreetype --enable-libass --enable-libutvideo --enable-filters --enable-postproc --enable-runtime-cpudetect
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/xtophe/Desktop/passthruissue.mp4':

Metadata:

major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.25.101

Duration: 00:00:05.54, start: 0.000000, bitrate: 14297 kb/s

Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 14107 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 59.94 tbc (default)
Metadata:

handler_name : VideoHandler

Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 256 kb/s (default)
Metadata:

handler_name : SoundHandler

Side data:

unknown side data type 7 (4 bytes)

At least one output file must be specified

[Atarikid]

Here is a download link of the source file:
​https://www.dropbox.com/s/e3gwkvk6rnf74km/00007.MTS?dl=0

Please let mr know if you downloaded the file so I can remove it from Dropbox.

[Michael Niedermayer]

So the only problem is the fps value displayed by ffmpeg ? or is there some other problem in the actual content or playback speed or such ?

[Carl Eugen Hoyos]

Please reopen this ticket if you can answer Michael's questions.