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I have a video for which I'd like to convert the audio codec to AAC 320 kbps / 44.100 kHz. What would I use for ffmpeg switches such that all the video settings and codec remain the same, but only the audio codec and settings change?
Here's my video:
$ ffmpeg -i Winnipeg.rb\ Scala-Talk.mov
FFmpeg version SVN-r25375, Copyright (c) 2000-2010 the FFmpeg developers
built on Oct 6 2010 13:02:41 with gcc 4.2.1 (Apple Inc. build 5664)
configuration: --enable-libmp3lame --enable-shared --disable-mmx --arch=x86_64
libavutil 50.32. 2 / 50.32. 2
libavcore 0. 9. 1 / 0. 9. 1
libavcodec 52.92. 0 / 52.92. 0
libavformat 52.80. 0 / 52.80. 0
libavdevice 52. 2. 2 / 52. 2. 2
libavfilter 1.48. 0 / 1.48. 0
libswscale 0.12. 0 / 0.12. 0
Seems stream 0 codec frame rate differs from container frame rate: 2000.00 (2000/1) -> 10.00 (10/1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Winnipeg.rb Scala-Talk.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
Duration: 01:10:53.00, start: 0.000000, bitrate: 283 kb/s
Stream #0.0(eng): Video: h264, yuv420p, 800x598, 94 kb/s, 10 fps, 10 tbr, 1k tbn, 2k tbc
Stream #0.1(eng): Audio: adpcm_ima_qt, 22050 Hz, 1 channels, s16
Stream #0.2(eng): Audio: adpcm_ima_qt, 22050 Hz, 1 channels, s16
At least one output file must be specified
Many thanks in advance! One thing with ffmpeg I've never been able to grok is how to just "tweak" files without having to regurgitate every little setting for things you don't want changed.
The audio (as well as the video) appears to be fairly low quality. Note that you won't actually increase the quality of the audio by changing format, increasing sampling rate, and increasing bitrate. – Force Flow – 2010-11-27T01:18:18.927