Hello, I am facing an error when trying to decode HEVC-coded content for some video sequences. I varied the video resolution as follows: 2160p: decoded successfully 1600p: decoded successfully 1080p: error 720p: error
When I try to decode low resolutions (720p and 1080p), ffmpeg outputs the following error message: "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)" Below are the command line and the output. ------------------------------------------------------------------------------- root@linaro-developer:~# ffmpeg -vcodec hevc_v4l2m2m -i vary_resolution/kimono/AMP_D_Hisilicon_3_1080p_fps_25.265 -f null out.null ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-nonfree --enable-static --disable-shared --enable-pthreads --enable-neon --enable-thumb --enable-optimizations --enable-libv4l2 libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, hevc, from 'vary_resolution/kimono/AMP_D_Hisilicon_3_1080p_fps_25.265': Duration: N/A, bitrate: N/A Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x1080, 25 fps, 25 tbr, 1200k tbn, 25 tbc [hevc_v4l2m2m @ 0xaaaae2112410] Using device /dev/video0 [hevc_v4l2m2m @ 0xaaaae2112410] driver 'qcom-venus' on card 'Qualcomm Venus video decoder' in mplane mode [hevc_v4l2m2m @ 0xaaaae2112410] requesting formats: output=HEVC capture=NV12 Stream mapping: Stream #0:0 -> #0:0 (hevc (hevc_v4l2m2m) -> wrapped_avframe (native)) Press [q] to stop, [?] for help [hevc_v4l2m2m @ 0xaaaae2112410] VIDIOC_G_FMT ioctl Last message repeated 99 times Output #0, null, to 'out.null': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: wrapped_avframe, yuv420p, 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 wrapped_avframe frame= 0 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used) ------------------------------------------------------------------------------- *Note*: when I drop the "-vcodec hevc_v4l2m2m" option, the decoding is done successfully. But, that's not what I am lookign for. I need the hardware acceleration. Any help is welcome. Best regards Mohammed _______________________________________________ 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".