The above code is working because I anycodings_ffmpeg selected ac3 codec for audio1.wav. Besides, it can also crop and trim videos. Apart from that, FFmpeg can record, convert, combine video, and audio files. You need to input command lines to extract audio track from mp4.
Sp.run('ffmpeg -y -i input1.mp4 -i audio1.wav -c:v copy -c:a copy output1.mp4') FFmpeg is a command-based video editor as well as a free open-source tool. Sp.run('ffmpeg -y -f lavfi -i sine=frequency=400 -acodec ac3 -ar 22050 -t 5 audio1.wav') Testing the solution by generating anycodings_ffmpeg synthetic audio and video input files: import subprocess as sp Using -c:a copy works when the codec of anycodings_ffmpeg the wav file is ac3 for example (but anycodings_ffmpeg it's a rare case). Could not find anycodings_ffmpeg tag for codec pcm_s16le in stream #1, anycodings_ffmpeg codec not currently supported in anycodings_ffmpeg containerĬould not write header for anycodings_ffmpeg output file #0 (incorrect codec anycodings_ffmpeg parameters ?): Invalid argument I am getting the following error anycodings_ffmpeg message: wav file anycodings_ffmpeg as input, and store result into. In most cases you can't keep the audio anycodings_ffmpeg codec (using -c:a copy) with. Test the conversion in ffmpeg command anycodings_ffmpeg line (in console) before using Python anycodings_ffmpeg and verify there are no errors. ffmpeg -loop 1 -framerate 1 -i image.jpg -i music.mp3 -c:v libx264 -preset veryslow -crf 0 -c:a copy -shortest output.mkv. It is slower than the stream copy method below, but potentially will output a smaller file size. Sp.run('ffmpeg -y -i /content/input.mp4 -i audio.wav -c:v copy -c:a copy output.mp4') This method uses libx264 to encode H.264 video. The article he quotes mentions using multi-pass conversion, which is a good way to achieve better compression without sacrificing quality.For executing ffmpeg withing Python, you anycodings_ffmpeg may use subprocess: import subprocess as sp Marty Jay helpfully mentions that sameq means same quantizer as in the input, which may not result in the same quality. The last time I transcoded video I used qscale=8.0, but I'd suggest that you experiment to find the optimum to match the quality of your input. The lower the number the better the quality, but the more space your file will take. Alternatively, you may want to use the qscale option to set the quality manually. I hope you can use zetah's suggestion above in his comment and use the -sameq switch. If you must transcode because you need to use a particular video codec codec:copy may be helpful if you don't have a reason to transcode (and it should be faster). You always lose a little quality whenever you transcode from one codec to another, video or audio, but perhaps you can avoid it if you only want to change from MP4 container type to an AVI container.
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