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A quick guide to using FFmpeg to convert media files ...
https://opensource.com/article/17/6/ffmpeg-convert-media-file-formats#:~:text=It%20can%20be%20very%20time%20consuming%20to%20re-encode,encodes%20the%20Vorbis%20audio%20stream%20into%20a%20FLAC.
Re-encode video stream only with ffmpeg (and with all ...
https://stackoverflow.com/questions/39685629/re-encode-video-stream-only-with-ffmpeg-and-with-all-audio-streams
ffmpeg -i in.mkv -vf scale=hd720 -map 0 -c copy -c:v libx265 out.mkv To encode audio as well, ffmpeg -i in.mkv -vf scale=hd720 -map 0 -c copy -c:v libx265 -c:a aac out.mkv (The order of the arguments above matter)
Audio Transcoding using FFmpeg - Change Audio Codecs using ...
https://ottverse.com/transcode-audio-codec-ffmpeg-without-changing-video/
ffmpeg -i input_filename.avi -acodec mp3 -vcodec copy output_filename.avi Here, you are instructing FFmpeg to. read the input file named input_filename.avi that is in an avi media container that holds both the audio and video. copy the video content as is using the -vcodec copy parameter (no video re-encoding), use mp3 audio codec to re-encode the audio
ffmpeg: re-encode a video, keeping settings similar ...
https://superuser.com/questions/1056599/ffmpeg-re-encode-a-video-keeping-settings-similar
ffmpeg -i input.mp4 -c:v libx264 -crf 18 -preset slow -c:a copy output.mp4. This example stream copies the audio instead of re-encoding it since the majority of the file size comes from video. Development is very active, so make sure to use a recent build of ffmpeg. See the FFmpeg Download page for links to binaries.
FFmpeg
December 5th, 2015, The native FFmpeg AAC encoder is now stable! After seven years the native FFmpeg AAC encoder has had its experimental flag removed and declared as ready for general use. The encoder is transparent at 128kbps for most samples tested with artifacts only appearing in extreme cases.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
Before encoding, ffmpeg can process raw audio and video frames using filters from the libavfilter library. Several chained filters form a filter graph. ffmpeg distinguishes between two types of filtergraphs: simple and complex. 3.1.1 Simple filtergraphs Simple filtergraphs are those that have exactly one input and output, both of the same type.
How to use FFMpeg to do Simple Audio Conversion
https://www.howtoforge.com/tutorial/ffmpeg-audio-conversion/
ffmpeg -i filename.mp3 newfilename.wav newfilename.ogg newfilename.mp4. This will result in converting 3 output audio files (wav,ogg,mp4) from one mp3 file. Alternatively, you can set the desired codec using the -c command like this: ffmpeg -i filename.mp4 c:a libopus newfilename.ogg
How to Remove Audio from Video using FFmpeg ... - …
https://ottverse.com/add-remove-extract-audio-from-video-using-ffmpeg/
Now, let’s take a different use case where you might want to re-encode the audio after extracting it. Here’s how to extract the audio from the video using FFmpeg and then encoding it to a different quality level using libmp3lame and storing it as an mp3 file. ffmpeg.exe -i videoWithAudio.mp4 -vn -c:a libmp3lame -q:a 1 onlyAudio.mp3
Would like to change audio codec, but keep video settings ...
https://superuser.com/questions/215430/would-like-to-change-audio-codec-but-keep-video-settings-with-ffmpeg
If you just want to change the audio and/or video codec(s) you could just add them as parameters like so: Just change the audio codec to mp3 (what ever the original codec was) ffmpeg -i input.avi -vcodec copy -acodec mp3 out.avi Just change the video codec to h264. ffmpeg -i input.avi -vcodec h264 out.avi
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