Technical details of converting AV formats from whatever you have, to whatever you need to use.
Check with your local jurisdiction’s intellectual property laws before doing any of these if your source file has DRM.
See also remix, innovation.
XLD, X Lossless Decoder, is an amazing free app for transcoding arbitrary audio between formats
ffmpeg (TBD) is amazing for video, if you wish to salvage pure audio for your fair-use sampling:
ffmpeg -i Pernikahan\ Dini\ -\ Cita\ Citata\ -\ DASH.m4a -acodec copy -vn Pernikahan\ Dini\ -\ Cita\ Citata.m4a
Or to stitch photos to video for making animated GIFs:
ffmpeg -framerate 5 -start_number 1234 -i IMG_%04d.JPG -c:v libx264 -pix_fmt yuv420p -vf scale=1920:-2:flags=lanczos -crf 20 -preset slow -c:a copy ../something.m4v
Need offline versions of youtube videos or youtube video soundtracks? Firefox extension Media extractor gets these. There are SO MANY times you need this, such as giving lectures in Indonesia with supporting videos where you don’t have 1 hour to cache EACH VIDEO if YOU ARE LUCKY. Grrrrrrr. Also, AFAICT it’s legal in Indonesia as long as you don’t show penises in said video. Although it’s hard to tell for sure.
Automated trancoding of some format playable in iTunes which you can’t sample in your audio software:
- Macsome Audiobook/itunes converter (Sporadically updated, has trouble with recent iTunes)
- tuneskit have a converter that seems to mostly focus on DRM-removal rather than general media conversion. Whilst it works with recent iTunes, it is not fantastically flexible in configuration options; If you have a particular encoding quality or sampling rate that you wish to convert to, this will not help you, and you will end up using XLD.