On 1 March 2013 17:49, RenE J.V. Bertin <[email protected]> wrote: > > > > > What if you buffer in memory by using a custom AvIO context or however > that's called? At least you be able to catch seeks that go where they > shouldn't ... and it might be less platform specific? > > R > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user >
The problem is that the recording could be hours long! The problem seems to be down to the fact that some formats don't write the header info until the file is closed. This is certainly true of mxf'd DV. I debugged into the mxf muxer and found that duration was 0 - no surprise really..... I do have more success is I seek using AV_SEEK_BYTE rather than AV_SEEK_FRAME which I am looking at now. I know some solutions record off 'chunks' of video and store the latest x mins in memory. Then have an algorithm that loads the relevant chunk ahead of time. But a bit laborious and I'd end up with a bunch of small files. Steve
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