On Fri, 16 Aug 2019 at 04:20, Andreas Rheinhardt < andreas.rheinha...@gmail.com> wrote:
> Up until now, the H.264 parser has allocated a new buffer for every > frame in order to store the unescaped RBSP in case the part of the RBSP > that will be unescaped contains 0x03 escape bytes. This is expensive > and this commit changes this: The buffer is now kept and reused. > > For an AVC file with an average framesize of 15304 B (without in-band > parameter sets etc.) and 132044 frames (131072 of which ended up in the > results) this reduced the average time used by the H.264 parser from > 87708 decicycles (excluding about 1100-1200 skips in each iteration) > to 16963 decicycles (excluding about 10-15 skips in each iteration). > The test has been iterated 10 times. > If I understand correctly, this patch means if you have a large frame (or large NAL) you are stuck with the large allocation of memory until the decoder is closed. Not sure if you have read the discussion here https://patchwork.ffmpeg.org/patch/5631/ Kieran _______________________________________________ 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".
