What is the difference between ffmpeg -thread and ffmpeg-mt?

Post ffmpeg-mt's merge with ffmpeg开发者_C百科...

March 21, 2011

Today FFmpeg-mt, the multithreaded decoding branch, has been merged into FFmpeg. This has been a long awaited merge, and we would like to thank Alexander Strange for his patience and hard work.

... what is to be expected of ffmpeg -thread usage? Is this an under-the-hood transition or are ffmpeg users supposed to move their code to ffmpeg-mt to leverage multi-cores?

I believe ffmpeg-mt has multithreaded decoders as well as a multithreaded encoders.

Since conversions involve both decoding and encoding, the -mt version should be faster.

PS: This is an old question, but since is the first google result, I just added the answer from the videohelp forums https://forum.videohelp.com/threads/317689-Difference-between-ffmpeg-threads-and-ffmpeg-mt