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MKV does not store a frame rate in its container. So ffmpeg/vlc looks at the default duration of a frame instead. It sees 33.333ms and does the math, which is where your weird number comes from. Source: To test this out, you can run ffprobe with -show_frames. I think you'll find the ...


Advanced Authoring Format (AAF) and some MXF operational patterns (OP-2a, 2b, 3a, and 3b) should be able mix bit rates. I say "should" because I don't have any good way of testing right now and I don't know of any commercial systems that are making heavy use of those MXF OP's.


Well I can't say I know how it would be done; but RED (, their R3D video format uses a debayer process. I own a RED Epic. It shoots at up to 5K 100 FPS. When out in the field, and wanting to view the video on say a laptop, the throughput of uncompressed (or near) say 3:1 5K is huge. So RED uses a debayer process; where the pixels are ...


If the only difference is bitrate, then any container which accepts variable bitrate streams, will fulfill your requirement e.g. MP4, MKV..etc Step 1 is to encode your segments, ideally using the same encoder, to different bitrates with all other parameters being the same e.g. via ffmpeg, ffmpeg -ss 0 -t 5 -i input.mp4 -b:v 1000k seg1.mp4 ffmpeg -ss 5 -t ...

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