![]() ![]() You can also just use the -c copy parameter to copy audio and video from the original to the output, which will result in lossless quality. ![]() There are a couple of more obscure ones like Grass Valley, huffyUV, dirac and so on, but if you can't use DNxHD it's unlikely these will be any use to you. ffmpeg -i largefile.mp4 -t 00:50:00 -c -vcodec copy -acodec copy smallfile1.mp4 \-ss 00:50:00 -c -vcodec copy -acodec copy smallfile2.mp4. Since you're on linux I won't suggest Cineform, it's a good intermediate codec on win/mac but I don't think there's a CFHD codec for linux yet, and ffmpeg can only decode it (it's been open-sourced so that will probably change). Lossless write/read of uint16 3D arrays (useful for saving depth frames stored in mm. Substitute your codec of choice here: ffmpeg -i uncompressed.mov -c:v CODEC -c:a pcm_s16le output.mov from videoio import VideoReader for frame in VideoReader(in.mp4). Oh and there's JPEG2000 if you really want, though it's not recommended. You can also use the prores 4444 variation to avoid chroma subsampling (reduction of the colour resolution) and alpha channel support.įailing that you can use motion-JPEG, or even 2 flavours of lossless JPEG (I have no idea what the difference is). Depending on your container of choice, this wont always work. One of the biggest advantages of prores is the support for 10-bit encoding, giving you much better colour fidelity. ffmpeg -i input.mp4 output.webm Because WebM is a well-defined format, FFmpeg automatically knows what video and audio it can support and will convert the streams to be a valid WebM file. Probably the most-used intermediate codec is Apple's prores 422, which can be encoded cross platform using ffmpeg thus: ffmpeg -i uncompressed.mov -c:v prores -profile:v 3 -c:a pcm_s16le output.mov What should I do to preserve the color You need 10bit YUV to preserve exact 8bit RGB colors. ![]() Effort: higher is better, 7 is the best quality, 1 - the worst. DNxHD and JPEG are not the only game in town as far as intermediate codecs are concerned (intermediate codecs being high-quality, visually lossless codecs designed for moving media between steps in a post-production chain). ffmpeg -i inp.png out.mp4 It produces an output video file with color rgb 190,177,0. Distance: Butteraugli distance, lower is better, 0.0 - lossless, 15.0 - minimum quality. ![]()
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