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 _______________________________________________ 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".
