On Thu, 17 May 2018, 09:57 [email protected], < [email protected]> wrote:
> Hi All, > I am capturing mjpeg frames from my webcam connected to a bananapi, > running armbian. The resulting video file is choppy when played with > mplayer and VLC, and in the console I see the following messages. The CPU > of the bananapi is nowhere near 100% > cedric@bananapi:~/FFmpeg$ ./ffmpeg -f v4l2 -input_format mjpeg -s > 1280x720 -i /dev/video0 -c:v copy output.mkv > ffmpeg version N-86245-gcd67ff8 Copyright (c) 2000-2017 the FFmpeg > developers > built with gcc 5.4.0 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 20160609 > configuration: --prefix=/usr --enable-nonfree --enable-gpl > --enable-version3 --enable-vdpau --enable-libx264 --enable-libmp3lame > --enable-libpulse --enable-libv4l2 > libavutil 55. 63.100 / 55. 63.100 > libavcodec 57. 96.101 / 57. 96.101 > libavformat 57. 72.101 / 57. 72.101 > libavdevice 57. 7.100 / 57. 7.100 > libavfilter 6. 90.100 / 6. 90.100 > libswscale 4. 7.101 / 4. 7.101 > libswresample 2. 8.100 / 2. 8.100 > libpostproc 54. 6.100 / 54. 6.100 > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 1488.098843, bitrate: N/A > Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), > 1280x720, 30 fps, 30 tbr, 1000k tbn, 1000k tbc > File 'output.mkv' already exists. Overwrite ? [y/N] y > Output #0, matroska, to 'output.mkv': > Metadata: > encoder : Lavf57.72.101 > Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, > bt470bg/unknown/unknown), 1280x720, q=2-31, 30 fps, 30 tbr, 1k tbn, 1000k > tbc > Stream mapping: > Stream #0:0 -> #0:0 (copy) > Press [q] to stop, [?] for help > [matroska @ 0x1c48860] Non-monotonous DTS in output stream 0:0; previous: > 3109, current: 2048; changing to 3109. This may result in incorrect > timestamps in the output file. > [matroska @ 0x1c48860] Non-monotonous DTS in output stream 0:0; previous: > 3109, current: 2080; changing to 3109. This may result in incorrect > timestamps in the output file. > Is there a way to prevent he above errors? > Is there a way to post-process the output file so VLC can play it? > Cheers, > Cedric > Have you tried... ffmpeg -fflags +igndts -f v4l2 (...) ? > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
