Hi, hope somebody can help solving a segmentation fault caused by using the h264_v4l2m2m encoder on an Samsung Exynos5422.
I tested the encoder using the unmodified examples (git master): - encode_video.c - transcoding.c > # ./encode_video out h264_v4l2m2m > [h264_v4l2m2m @ 0x49e150] driver 'uvcvideo' on card 'RYS HFR USB2.0 Camera: > RYS HFR ' > [h264_v4l2m2m @ 0x49e150] driver 'exynos-gsc' on card 'exynos-gsc gscaler' > [h264_v4l2m2m @ 0x49e150] driver 'exynos-gsc' on card 'exynos-gsc gscaler' > [h264_v4l2m2m @ 0x49e150] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x49e150] Using device /dev/video11 > [h264_v4l2m2m @ 0x49e150] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x49e150] Encoder does not support b-frames yet > [h264_v4l2m2m @ 0x49e150] h264 profile not found > [h264_v4l2m2m @ 0x49e150] Encoder adjusted: qmin (0), qmax (51) > Send frame 0 > Segmentation fault (core dumped) > # ./transcoding sintel-1280-surround.mp4 out.mp4 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sintel-1280-surround.mp4': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2avc1mp41 > creation_time : 1970-01-01T00:00:00.000000Z > title : Sintel > encoder : Lavf52.78.5 > copyright : (c) Copyright 2010 Blender Foundation, all rights > reserved > description : Sintel open movie project > Duration: 00:14:48.06, start: 0.000000, bitrate: 2062 kb/s > Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, > 1280x544, 1615 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default) > Metadata: > creation_time : 1970-01-01T00:00:00.000000Z > handler_name : VideoHandler > Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, > fltp, 440 kb/s (default) > Metadata: > creation_time : 1970-01-01T00:00:00.000000Z > handler_name : SoundHandler > [h264_v4l2m2m @ 0x5051d0] driver 'uvcvideo' on card 'RYS HFR USB2.0 Camera: > RYS HFR ' > [h264_v4l2m2m @ 0x5051d0] driver 'exynos-gsc' on card 'exynos-gsc gscaler' > [h264_v4l2m2m @ 0x5051d0] driver 'exynos-gsc' on card 'exynos-gsc gscaler' > [h264_v4l2m2m @ 0x5051d0] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x5051d0] Using device /dev/video11 > [h264_v4l2m2m @ 0x5051d0] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x5051d0] h264 profile not found > [h264_v4l2m2m @ 0x5051d0] Encoder adjusted: qmin (0), qmax (51) > Segmentation fault (core dumped) However using ffmpeg directly with the following command works as expected: > # ffmpeg -vcodec h264_v4l2m2m -i sintel-1280-surround.mp4 -vcodec > h264_v4l2m2m output.mp4 > ffmpeg version n4.1 Copyright (c) 2000-2018 the FFmpeg developers > built with gcc 8.2.0 (GCC) > configuration: --prefix=/usr --disable-debug --disable-static > --disable-stripping --enable-fontconfig --enable-gmp --enable-gnutls > --enable-gpl --enable-ladspa --enable-libass --enable-libbluray > --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm > --enable-libiec61883 --enable-libjack --enable-libmodplug --enable-libmp3lame > --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg > --enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex > --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab > --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 > --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid > --enable-omx --enable-shared --enable-version3 --host-cflags='"-fPIC"' > libavutil 56. 22.100 / 56. 22.100 > libavcodec 58. 35.100 / 58. 35.100 > libavformat 58. 20.100 / 58. 20.100 > libavdevice 58. 5.100 / 58. 5.100 > libavfilter 7. 40.101 / 7. 40.101 > libswscale 5. 3.100 / 5. 3.100 > libswresample 3. 3.100 / 3. 3.100 > libpostproc 55. 3.100 / 55. 3.100 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sintel-1280-surround.mp4': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2avc1mp41 > creation_time : 1970-01-01T00:00:00.000000Z > title : Sintel > encoder : Lavf52.78.5 > copyright : (c) Copyright 2010 Blender Foundation, all rights > reserved > description : Sintel open movie project > Duration: 00:14:48.06, start: 0.000000, bitrate: 2062 kb/s > Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, > 1280x544, 1615 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default) > Metadata: > creation_time : 1970-01-01T00:00:00.000000Z > handler_name : VideoHandler > Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, > fltp, 440 kb/s (default) > Metadata: > creation_time : 1970-01-01T00:00:00.000000Z > handler_name : SoundHandler > [h264_v4l2m2m @ 0x4f1b10] driver 'uvcvideo' on card 'RYS HFR USB2.0 Camera: > RYS HFR ' > [h264_v4l2m2m @ 0x4f1b10] driver 'exynos-gsc' on card 'exynos-gsc gscaler' > Last message repeated 1 times > [h264_v4l2m2m @ 0x4f1b10] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x4f1b10] driver 's5p-mfc' on card 's5p-mfc-dec' > [h264_v4l2m2m @ 0x4f1b10] Using device /dev/video10 > [h264_v4l2m2m @ 0x4f1b10] driver 's5p-mfc' on card 's5p-mfc-dec' > Stream mapping: > Stream #0:0 -> #0:0 (h264 (h264_v4l2m2m) -> h264 (h264_v4l2m2m)) > Stream #0:1 -> #0:1 (aac (native) -> aac (native)) > Press [q] to stop, [?] for help > [h264_v4l2m2m @ 0x524dd0] driver 'uvcvideo' on card 'RYS HFR USB2.0 Camera: > RYS HFR ' > [h264_v4l2m2m @ 0x524dd0] driver 'exynos-gsc' on card 'exynos-gsc gscaler' > Last message repeated 1 times > [h264_v4l2m2m @ 0x524dd0] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x524dd0] Using device /dev/video11 > [h264_v4l2m2m @ 0x524dd0] driver 's5p-mfc' on card 's5p-mfc-enc' > [h264_v4l2m2m @ 0x524dd0] h264 profile not found > [h264_v4l2m2m @ 0x524dd0] Encoder adjusted: qmin (0), qmax (51) > Output #0, mp4, to 'output.mp4': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2avc1mp41 > description : Sintel open movie project > title : Sintel > copyright : (c) Copyright 2010 Blender Foundation, all rights > reserved > encoder : Lavf58.20.100 > Stream #0:0(und): Video: h264 (h264_v4l2m2m) (avc1 / 0x31637661), nv21, > 1280x544, q=2-31, 200 kb/s, 24 fps, 12288 tbn, 24 tbc (default) > Metadata: > creation_time : 1970-01-01T00:00:00.000000Z > handler_name : VideoHandler > encoder : Lavc58.35.100 h264_v4l2m2m > Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, > fltp, 341 kb/s (default) > Metadata: > creation_time : 1970-01-01T00:00:00.000000Z > handler_name : SoundHandler > encoder : Lavc58.35.100 aac > [mp4 @ 0x4edfd0] Non-monotonous DTS in output stream 0:0; previous: 0, > current: 0; changing to 1. This may result in incorrect timestamps in the > output file. > ^Came= 218 fps= 54 q=-0.0 size= 15616kB time=00:00:09.15 > bitrate=13978.0kbits/s speed=2.27x Hope we can fix the examples for the MFC Samsung h264_v4l2m2m encoder. Have a great day! Kind Regards Roland _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
