On 06.10.2015 11:12, Soner CAN wrote:
[...]
What I want to do is setting the videos duration to EXACTLY 00:00:30.00.
I tried this:
ffmpeg -i 7347-00009\ kliksa.mp4 -c copy -ss 00:00:00.000 -to 30.000 test.mp4
But I still have a duration of 00:00:30.02. Here is ffprobe output:
ffprobe test.mp4
ffprobe version 2.6.1 Copyright (c) 2007-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.1
--enable-shared --enable-pthreads --enable-gpl --enable-version3
--enable-hardcoded-tables --enable-avresample --cc=clang
--host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame
--enable-libvo-aacenc --enable-libxvid --enable-libfreetype
--enable-libvorbis --enable-libvpx --enable-libass --enable-ffplay
--enable-libfdk-aac --enable-libopus --enable-libquvi --enable-libx265
--enable-nonfree --enable-vda
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
libavresample 2. 1. 0 / 2. 1. 0
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 'test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.25.101
Duration: 00:00:30.02, start: 0.000000, bitrate: 7240 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], 6982 kb/s, 25 fps, 25 tbr, 90k tbn, 50
tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 255 kb/s (default)
Metadata:
handler_name : SoundHandler
So, how can I have a video cut frame accurately?
If you use "-c:v copy" I assume the video will only be cut at GOP
borders. So if you do not have an intra-frame video file you have to
re-encode the file with "-c:v libx264 ..." to get frame-exact range
extraction.
Regards,
Tobias
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