[FFmpeg-user] Change frame rate without dropping/adding frames
Elliott Balsley
elliottbalsley at gmail.com
Mon Sep 8 17:36:01 CEST 2014
Works fine with vanilla WMP.
(And I wonder which other application should be
relevant for avi.)
H.264 AVI does not work in Quicktime, Resolve, Premiere, etc. I would like to use MOV. Strange that this conversion works going to AVI, but not going to MP4 or MOV.
So if he is happy with the 2 stage process (or piping avi format out into a second ffmpeg instance stream copying back to mov) then it looks like he has a workflow.
This piping would accomplish what I need, but I imagine it would be faster if ffmpeg could do it directly.
I also noticed that while this conversion works to decrease the frame rate, it doesn’t work to increase it. For example, with a source video at 29.97, the following command produces a file at 29.97.
$ ffmpeg -r 60 -i jason.mov -an -vcodec copy -f avi pipe: | ffmpeg -i pipe: -vcodec copy jason60.mov
ffmpeg version 2.3.git-90b2f31ffmpeg version 2.3.git-90b2f31 Copyright (c) 2000-2014 the FFmpeg developers Copyright (c) 2000-2014 the FFmpeg developers
built on Aug 24 2014 23:37:03 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass --enable-libbluray --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-indev=jack --disable-outdev=xv --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --enable-vda --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac --enable-libfaac
built on Aug 24 2014 23:37:03 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass --enable-libbluray --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-indev=jack --disable-outdev=xv --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --enable-vda --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac --enable-libfaac
libavutil 54. 4.100 / 54. 4.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 1.100 / 56. 1.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.100 / 5. 0.100
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
libavutil 54. 4.100 / 54. 4.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 1.100 / 56. 1.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.100 / 5. 0.100
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'jason.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-01-25 00:00:46
make : Apple
make-eng : Apple
encoder : 6.0.1
encoder-eng : 6.0.1
date : 2013-01-24T18:00:46-0600
date-eng : 2013-01-24T18:00:46-0600
location : +32.4836-095.5763+156.082/
location-eng : +32.4836-095.5763+156.082/
model : iPhone 4
model-eng : iPhone 4
Duration: 00:03:48.93, start: 0.000000, bitrate: 10654 kb/s
Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, 10582 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 1200 tbc (default)
Metadata:
rotate : 90
creation_time : 2013-01-25 00:00:46
handler_name : Core Media Data Handler
encoder : H.264
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2013-01-25 00:00:46
handler_name : Core Media Data Handler
Output #0, avi, to 'pipe:':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
model-eng : iPhone 4
make : Apple
make-eng : Apple
model : iPhone 4
ISFT : Lavf56.1.100
ICRD : 2013-01-24T18:00:46-0600
date-eng : 2013-01-24T18:00:46-0600
location : +32.4836-095.5763+156.082/
location-eng : +32.4836-095.5763+156.082/
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720, q=2-31, 10582 kb/s, 29.97 fps, 60 tbn, 60 tbc (default)
Metadata:
rotate : 90
creation_time : 2013-01-25 00:00:46
handler_name : Core Media Data Handler
encoder : H.264
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
Input #0, avi, from 'pipe:':
Metadata:
date : 2013-01-24T18:00:46-0600
encoder : Lavf56.1.100
Duration: 4971:01:37.07, start: 0.000000, bitrate: N/A
Stream #0:0: Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, 60 fps, 30 tbr, 60 tbn, 120 tbc
Output #0, mov, to 'jason60.mov':
Metadata:
date : 2013-01-24T18:00:46-0600
encoder : Lavf56.1.100
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720, q=2-31, 60 fps, 15360 tbn, 60 tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
frame= 6861 fps=0.0 q=-1.0 Lsize= 295859kB time=00:03:48.91 bitrate=10587.6kbits/s
video:295747kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.037867%
frame= 6861 fps=0.0 q=-1.0 Lsize= 295780kB time=00:03:48.91 bitrate=10584.8kbits/s
video:295747kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.011085%
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