Part of the implementation of #2709 and part of the fix of #2250. Now SPS & PPS NALUs are always writtenīefore the other NALUs.
MKVToolNix GUI: using one of the command line options.You can do it all in one step and that way MKVToolNixGUI can split the audio and video together at frame 950 for you. There's method to that madness though, because when you join the three sections together you know you now have a keyframe at frame 950 (where you wanted to split originally) so you can append the three sections, add the audio, then set MKVToolNix to split at frame 950 and remux. One with this at the end as before:Īnd another containing the last 50 frames I don't want. I generally go one step further and after splitting the first 900 frames I'd encode the rest using two scripts. When that's done you'd have a split section that's the first 900 frames and a re-encode of the next 50 frames you can append together with MKVToolNixGUI. That being the case, I'd split on 900 and then re-encode the next 50 frames by putting Trim() at the end of the script. The problem is, in this example the last keyframe is frame 900 so you can't split on 950. You encode it all but later realise you want to discard the last 50 frames. That way, if you need to split where there's no keyframe you can split a bit earlier and then re-encode just a small section of video. What program are you using for encoding these days? For the x264 encoder if you always use -stitchable in the command line (or have it checked in the program's encoder configuration) it'll ensure you can always join encoded video together (as long as it's the same resolution and the same encoder settings were used).
For fade-ins and fade-outs though, where there's no major change from one frame to the next (as happens on a scene change) that's not necessarily the case. That's the maximum, but the encoder is also good at putting them on the first frame of a scene, so often they're exactly where you need them for cutting.
For the x264 encoder, the "maximum" distance between keyframes is 10 seconds by default. I'm pretty sure DVDShrink is still limited to keyframe cutting, but for mpeg2 video the keyframes are generally much closer together.
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