On Mon, 14 Oct 2024 at 18:57, Shane Warren <sha...@innovsys.com> wrote:
> I have a system with Intel Flex 140 cards and use ffmpeg to transcode > video on an Ubuntu 22.x system. Through a lot of testing, I have come up > with a flow that handles multicast h264 input (decoding using vaapi) with > h264/h265 output using QSV. I wanted to use QSV decoding but if I used QSV > decoding and QSV encoding, but QSV decoding seems to strip A53 captions > (which I need). > > I found one input stream that eventually crashes the vaapi decoder inside > of libmfx. > > The call stack ends up in some function in libfmx: > > Program terminated with signal SIGSEGV, Segmentation fault. > > #0 0x00007f14b22d9f88 in ?? () from > /usr/lib/x86_64-linux-gnu/libmfx-gen.so.1.2.10 > > Is there a way to get symbols for libmfx so I can get a better bug report, > or some suggestion on how to debug this. > > I have switched this stream to software decoding then QSV encoding, and it > is stable but obviously uses a bit more cpu. > > An extra question is: Will the QSV hardware decoder ever support passing > through a53 captions? > > Thanks, > > Shane Warren > Full ffmpeg command and uncut console output would help in understanding what's going on in your setup. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
