Sep 20, 2021, 20:43 by "Pekka Väänänen" : > Greetings! > > This small patch is required for high color 15-bit Westwood VQA3 videos > to be decoded properly. It just saves an offset of a VQFL chunk when it > sees one and then concatenates it with the packet of a later VQFR chunk > that contains full frame data. This way the (yet-to-be-merged) VQA3 > decoder can apply the updated codebook before rendering a new frame and > each packet contains a standalone frame, as expected. > > This change was already added by Adam Iglewski as part of GSoC 2009: > > https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2009-May/075047.html > > However that patch had a memory leak with the dynamically allocated > memory: > > https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2009-May/075154.html > > Here that problem is avoided because no heap allocation is done. > > One question though: is it a problem that I use avio_seek() to rewind > the stream? >
It's fine, but you do want to use ffio_ensure_seekback() to guarantee success, preferably calling it at just the moment the stream is at the position you're planning on rewinding back to. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
