Le nonidi 19 messidor, an CCXXIII, Marton Balint a écrit : > Actually I have one more patch I have not yet sent to the list, which adds > support to select frames by metadata to the select filters. > > With that, you can cut frame accurately from XDCAM HD files if you overshoot > outpoint a bit and store the useful timecodes in the packet metadata: > > ffconcat version 1.0 > file 'XDCAMHD.mxf' > in 01:04.00 > out 01:05.12 > metadata select.from=0 > metadata select.until=0.96 > duration 1 > file 'XDCAMHD.mxf' > in 01:06.00 > out 01:07.12 > duration 1 > metadata select.from=1 > metadata select.until=1.96 > > ./ffmpeg -copyts -vsync 0 -i test.concat > -vf "select='between(t,meta(0),meta(1)):meta_keys=select.from|select.until'" > -af > "aselect='between(t,meta(0),meta(1)):meta_keys=select.from|select.until'"
Interesting. I suppose at some point some kind of "edltrim" filter would be nice, avoiding the need for a formula in the filters, but as is it does the work. One issue I had not thought of in my previous mail: per-packet metadata is unusual (so much so it uses side data instead of a field), so maybe the name of the directive should reflect that, so that just "metadata" would be available for per-stream or per-file metadata. I have no really good name for it, though: "all_packets_metadata" is all that comes to mind. Regards, -- Nicolas George
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