Hello, Why does it uses v4l2 in a different way and requires a nvv4l2 file instead of v4l_m2m or v4l2?
BEst, On Mon, Jun 1, 2020, at 11:50, Amit Pandya wrote: > Hi all, > > This patch can support hardware-accelerated decode in ffmpeg on Jetson > platforms. > > ffmpeg application can use accelerated decode to read video files in the > following elementary/container formats and dump them in YUV 420 format: > H.264, H.265, VP8, VP9. MPEG2, MPEG4 > (NOTE: The ffmpeg package does not support MPEG4 container files). > > Steps to apply the patch: > 1) Clone the ffmpeg master branch: > git clone git://source.ffmpeg.org/ffmpeg > 2) cd ffmpeg > 3) Apply the patch > 0001-ffmpeg-Accelerated-hardware-decode-support-on-Jetson.patch > Command to apply the patch: > git apply 0001-ffmpeg-Accelerated-hardware-decode-support-on-Jetson.patch > > Steps to compile: > 1) Install "jetson_multimedia_api" package from latest Jetpack release. > Follow link to install jetpack on jetson: > https://developer.nvidia.com/embedded/jetpack > 2) Install below dependent packages on target using the command (if not > already installed by jetpack): > sudo apt install libv4l-dev > sudo apt install gcc > sudo apt install pkg-config > sudo apt install libegl1-mesa-dev > 3) Run following commands to build and install: > ./configure --enable-nvv4l2dec --enable-libv4l2 --enable-shared > --extra-libs="-L/usr/lib/aarch64-linux-gnu/tegra -lnvbuf_utils" > --extra-cflags="-I /usr/src/jetson_multimedia_api/include/" > make > sudo make install > export LD_LIBRARY_PATH=/usr/local/lib/ > 4) Run following commands to decode: > H264: ffmpeg -c:v h264_nvv4l2dec -i <input file> <output file> > H265: ffmpeg -c:v hevc_nvv4l2dec -i <input file> <output file> > MPEG2: ffmpeg -c:v mpeg2_nvv4l2dec -i <input file> <output file> > MPEG4: ffmpeg -c:v mpeg4_nvv4l2dec -i <input file> <output file> > VP8: ffmpeg -c:v vp8_nvv4l2dec -i <input file> <output file> > VP9: ffmpeg -c:v vp9_nvv4l2dec -i <input file> <output file> > > Example command: > ffmpeg -c:v mpeg2_nvv4l2dec -i libmpeg2bug.ts output_420.yuv > (Input file is referenced from https://samples.ffmpeg.org/MPEG2/) > > -Regards, > Amit Pandya > > > _______________________________________________ > 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". > > *Attachments:* > * 0001-ffmpeg-Accelerated-hardware-decode-support-on-Jetson.patch > * README.nvidia -- Jean-Baptiste Kempf - President +33 672 704 734 _______________________________________________ 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".
