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Libav documentation : avconv
https://www.libav.org/avconv.html
avconv is a very fast video and audio converter that can also grab from a live audio/video source. It can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter. avconv reads from an arbitrary number of input "files" ... ‘aac_main ’ ‘aac_low’ ‘ ...
Converting video/audio using avconv | ROXLU
https://www.roxlu.com/2013/002/converting-video-audio-using-avconv
Extract audio from movie:./avconv -i test_input.mp4 -acodec copy -vn -y out.aac. Export only video from movie:./avconv -i input.mov -an -vcodec copy out.mov. Combine audio and video file./avconv -i video_input.mov -i audio_input.mp3 -c copy audio_and_video.mov. Create video from image sequence./avconv -f image2 -i image-%03d.jpeg -b 65536k -r ...
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. …
Avconv ac3 to aac or mp3 is not synced with video - Ask …
https://askubuntu.com/questions/227497/avconv-ac3-to-aac-or-mp3-is-not-synced-with-video
To sync the audio stream with video time stamps we may use the -async option:-async samples_per_second Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps, the parameter is the maximum samples per second by which the audio is changed. -async 1 is a special case where only the start of the audio stream is corrected without any later …
12.04 - Batch extract audio with avconv without ...
https://askubuntu.com/questions/235892/batch-extract-audio-with-avconv-without-transcoding
Show activity on this post. I have about 70 mp4 files, and I want to extract the audio files directly without transcoding further. All the mp4 files have aac audio files. I understand I can use the following command to extract the audio file from one of the mp4 files: avconv -i "INPUT FILE" -map 0:1 -c:a copy "OUTPUT FILE".
Extract, merge audio video tracks with avconv [ffmpeg ...
http://tuxdiary.com/2014/08/29/extract-merge-audio-video-tracks-avconv/
$ 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 $ avconv -i video.mkv -itsoffset 00:00:00.2 -i audio96.aac -acodec copy -vcodec copy merged.mkv
Snippets/avconv - Libav
https://wiki.libav.org/Snippets/avconv
Extract audio from movie. avconv -i test_input.mp4 -c:a copy -vn -y out.aac. Export only video from movie. avconv -i input.mov -an -c:v copy out.mov. Combine audio and video file. avconv -i video_input.mov -i audio_input.mp3 -c copy audio_and_video.mov. Create video from image sequence. avconv -framerate 25 -f image2 -i image-%03d.jpeg -b ...
Encoding/aac - Libav
https://wiki.libav.org/Encoding/aac
avconv -i source -c:a libfdk_aac -profile aac_he_v2 -signaling implicit -f flv rtmp://server/app/room. latm encapsulation. The library provides -latm to encapsulate the data so it can be muxed correctly in TS streams. Use -header_period to set the number of frames the configuration extradata has to be emitted again. avconv -i source -c:a libfdk_aac -latm 1 -header_period 50 …
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 …
audio - How do I convert FLAC files to AAC (preferrably ...
https://unix.stackexchange.com/questions/77687/how-do-i-convert-flac-files-to-aac-preferrably-vbr-320k
Regardless, the built-in avconv/ffmpeg AAC encoder is pretty bad. ... AAC achieves audio transparency vs. original CD audio at around fixed 128 kbit/s): ffmpeg -i input.flac -c:a libfdk_aac -b:a 320k neroAacEnc. Nero's AAC encoder should be considered on-par with fdk_aac and qaac (Quicktime AAC). Different people will give different opinions on ...
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