CC-ing Ivan so he doesnt miss this though he should be following ffmpeg-devel and keeping an eye on qsv anyway ...
On Mon, Oct 12, 2015 at 08:10:04PM +0200, Stefano Sabatini wrote: > Hi all, > > I wanted to test QSV encoding and decoding, which is included since > several months in FFmpeg, and have a few questions. > > 1. QSV encoding and decoding depends on libmfx, but no references are > present in the code to the library, so I have to suppose that the > required library is this one: > https://github.com/lu-zero/mfx_dispatch > > While at it, do you know what's the point of the mfx_dispatch > component (why adding the intel media library path to flags is not > enough)? > > 2. The mfx_dispatch library compiles fine on my system, but then I > wonder how it is supposed to reference the Intel Media library: > https://software.intel.com/en-us/intel-media-server-studio > > ... > > I'm able to compile FFmpeg with --enable-libmfx after installing > the mfx_dispatch library, and run this command: > ffmpeg -i test.mp4 -c:v h264_qsv -y test.out.mp4 > > but then it fails with: > Error initializing an internal MFX session > > Running strace on the command it results that it's looking for the > libmfxsw64.so library and failing: > open("/lib/x86_64-linux-gnu/libmfxsw64.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT > (No such file or directory) > open("/usr/lib/x86_64-linux-gnu/libmfxsw64.so", O_RDONLY|O_CLOEXEC) = -1 > ENOENT (No such file or directory) > open("/lib/libmfxsw64.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or > directory) > open("/usr/lib/libmfxsw64.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file > or directory) > munmap(0x7f9a55072000, 155122) = 0 > > If I update the LD_LIBRARY_PATH to point to the intel media library in > /opt/intel/mediasdk it will find the library and then hang. > > I had some hard time finding relevant information on the Internet, so > I ask if you can help to clarify these points. > > I'll happily provide a few benchmarks and update documentation > accordingly if I manage to make it work. > -- > FFmpeg = Fancy and Forgiving Mean Problematic Excellent Gymnast > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB It is what and why we do it that matters, not just one of them.
signature.asc
Description: Digital signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
