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. If I do this in two steps, the chapter markers seem to be correctly placed: mkvmerge -v -split parts:1:00-1:10,2:00-2:10,3:00-3:10 -o splits.mkv mkvmerge -v -generate-chapters 'when-appending' -o indirect_append.mkv splits-001.mkv + splits-002.mkv + ffprobe -hide_banner indirect_append.mkv Multiplexing took 1 ffprobe -hide_banner split_and_append.mkv The cue entries (the index) are being written. The file 'split_and_append.mkv' has been opened for writing. 'isom_1280_720.mp4' track 0: Extracted the aspect ratio information from the MPEG-4 layer 10 (AVC) video data and set the display dimensions to 1280/720. Using the track with the ID 0 from the file 'isom_1280_720.mp4' as the reference for chapter generation. 'isom_1280_720.mp4' track 1: Using the output module for the format 'AAC'. 'isom_1280_720.mp4' track 0: Using the output module for the format 'AVC/H.264'.
'isom_1280_720.mp4': Using the demultiplexer for the format 'QuickTime/MP4'. If I do it in a single command (which seems to be supported), the chapter markers are offset by a large negative value. I'm trying to cut select parts of a video, and recombine these parts w/ chapter markers.
0 kommentar(er)
