On Fri, Dec 24, 2021 at 04:52:35PM +0100, Timo Rothenpieler wrote: > On 24.12.2021 15:47, lance.lmw...@gmail.com wrote: > > > > You can tested with libx264 output file, the size of unregistered SEIs(for > > encoding > > setting) will > 503 always, if you don't make the size <= 503, you'll see > > below > > error by trace_eaders filter. > > Invalid SEI message: payload_size too large (xxx 504 bytes). > > > > Note, libavcodec/cbs_sei_syntax_template.c line 262, I print out > > "get_bits_left(rw) / 8". > > > > I think the buffer size is OK, but nvenc sdk truncate the data after > > encoding. > > What exactly are you referring to by nvenc sdk? Are you looking at some > Nvidia sample that does this truncating?
I guess it's caused by nv sdk library failed to forward the SEI data output completely. It's not related to the patch, so I tested with small size SEIs and veirfy the option working as expected. > Cause if I try this with ffmpeg right now, encoding straight up fails if a > too large SEI segment is attached, since nvenc runs out of space in the > output buffer. I haven created 5 frame by libx264 and test it, so maybe it's too short to cause encoding failed. I have used bsf filter to add user unregistered before, it haven't such limitation or issue. > _______________________________________________ > 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". -- Thanks, Limin Wang _______________________________________________ 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".
