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Encoding/aac - Libav
https://wiki.libav.org/Encoding/aac#:~:text=Supported%20by%20every%20profile%2C%20constant%20bitrate%20maps%20to,and%20for%205.1%20at%20least%20256kbps%20are%20suggested.
Libav documentation : avconv
https://www.libav.org/avconv.html
To force the frame rate of the input file (valid for raw formats only) to 1 fps and the frame rate of the output file to 24 fps: avconv -r 1 -i input.m2v -r 24 output.avi. The format option may be needed for raw input files. 3. Detailed description.
Converting video/audio using avconv - ROXLU
https://www.roxlu.com/2013/002/converting-video-audio-using-avconv
Convert PCM audio, 2 channels, interleaved float 32 (le), rate 4800 to wav:./avconv -f f32le -ac 2 -ar 48000 -i out.pcm out.wav. Speed up a movie:./avconv -i out.mov -filter:v "setpts=0.5*PTS" out2.mov. Create a h264 based video that only contains IDR frames:./avconv -i bbb.avi -an -vcodec x264 -g 1 -bsf h264_mp4toannexb out.h264
avconv - How can I extract the metadata and bitrate info ...
https://stackoverflow.com/questions/27745134/how-can-i-extract-the-metadata-and-bitrate-info-from-a-audio-video-file-in-pytho
I couldn't find a way to do it with Pydub or PySox. Here is my simplistic hamfisted beginner code I used that does work and puts the bitrate, duration, etc info into a variable audio_info and the metadata into metadata. OGG output worked differently than the other formats i tested (which was a ton of video and audio!).
ubuntu - avconv (ffmpeg): correct audio codec - Stack …
https://stackoverflow.com/questions/14083564/avconv-ffmpeg-correct-audio-codec
I solved this in Ubuntu 14.04 by using the libvo_aacenc codec instead of the aac codec. You could change your command to look something like this: avconv -i videoStream_1356794393712_805.flv -c:v mpeg4 -c:a libvo_aacenc videoStream_1356794393712_805.mp4. Share. Follow this answer to receive notifications. …
Audio is out of sync with Avconv - Ask Ubuntu
https://askubuntu.com/questions/381663/audio-is-out-of-sync-with-avconv
I am having issues with the audio going out of sync and getting worse as I go through my playlist. This is the code I'm using for avconv. And I can't figure out how to set the bitrate for the audio. I've seen -b as bandwidth but it looks like it should be the audio bitrate. How to resolve this ?
Snippets/avconv - Libav
https://wiki.libav.org/Snippets/avconv
avconv. Thanks to roxlu for providing most of them. Convert from raw x264 to flv (when you get an error with monotonically increasing dts) avconv -i test_input.264 -c:v copy output.flv. Convert from flv to mov and specify bitrate. avconv -i test_input.flv -b 512k output.mov. Extract audio from movie. avconv -i test_input.mp4 -c:a copy -vn -y out.aac
11 'Avconv' Commands to Record, Convert and Extract …
https://www.tecmint.com/avconv-command-examples/
Get Video and Audio File Information. If you want to get some information about any …
avconv: remove audio stream, keep audio and video ...
https://unix.stackexchange.com/questions/202135/avconv-remove-audio-stream-keep-audio-and-video-synchronized
I would like to discard two of the audio streams, keeping only one. I tried to do so using avconv (v11.3-6): avconv -i in.avi -map 0:0 -map 0:2 -vcodec copy -acodec copy out.avi. The problem is that in the resulting file the remaining audio stream is no longer correctly synced to the video stream, though they are synced in the original.
Extract, merge audio video tracks with avconv [ffmpeg ...
http://tuxdiary.com/2014/08/29/extract-merge-audio-video-tracks-avconv/
$ avconv -i handbrake_out.mkv -an -vcodec copy video.mkv; To convert the audio bitrate to 96kbps: $ avconv -i audio.aac -c:a aac -b:a 96k audio96.aac; Copy audio and video tracks to the same directory and merge them. Let’s say that you need to add some delay to the audio as well. The following command does it all
Encoding/aac - Libav
https://wiki.libav.org/Encoding/aac
Supported by every profile, constant bitrate maps to the avconv option '-b:a'. Depending on the profile, the rule of thumb is allotting at least 32kbps per channel in Low Complexity and Low Delay, 24kbps in High Efficiency and 16kbps for High Efficiency v2. For normal stereo at least 80kbps and for 5.1 at least 256kbps are suggested.
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