> Does it work without -c copy? I ask because I suspect discarding > cannot work reliably without decoding.
There are still the unexpected extra frames at the start of the video. The file generated is closer to a "normal" video in that it has preserved the 1s timing between keyframes. > For future questions: Please post the console output in your mail, > do not use external resources and please (only) test current FFmpeg > git head, not a two-year old version. Apologies, I didn't want to lengthen an already long and verbose post with the console output, but yes I will do in future. I have updated my ffmpeg build to 20191223-5b42d33 from https://ffmpeg.zeranoe.com/builds/ and the result is the same. I have run ffprobe against the working and non-working input files, here is the output: ffprobe version git-2019-12-23-5b42d33 Copyright (c) 2007-2019 the FFmpeg developers built with gcc 9.2.1 (GCC) 20191125 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf libavutil 56. 36.101 / 56. 36.101 libavcodec 58. 65.100 / 58. 65.100 libavformat 58. 35.101 / 58. 35.101 libavdevice 58. 9.101 / 58. 9.101 libavfilter 7. 69.101 / 7. 69.101 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2019-12-24_13-51-34.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : NVT encoder : Lavf57.83.100 comment : From NVT Duration: 00:00:14.93, start: 7290.494000, bitrate: 3701 kb/s Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1280x720, 3700 kb/s, 14.07 fps, 14 tbr, 90k tbn, 180k tbc (default) Metadata: handler_name : VideoHandler and ffprobe version git-2019-12-23-5b42d33 Copyright (c) 2007-2019 the FFmpeg developers built with gcc 9.2.1 (GCC) 20191125 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf libavutil 56. 36.101 / 56. 36.101 libavcodec 58. 65.100 / 58. 65.100 libavformat 58. 35.101 / 58. 35.101 libavdevice 58. 9.101 / 58. 9.101 libavfilter 7. 69.101 / 7. 69.101 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2019-12-24_13-57-25.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : Unnamed encoder : Lavf57.83.100 comment : N/A Duration: 00:00:14.97, start: 7665.101000, bitrate: 2815 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 2812 kb/s, 25.05 fps, 50 tbr, 90k tbn, 180k tbc (default) Metadata: handler_name : VideoHandler Are there any clues there that might explain why one video converts correctly and one does not? The frame rates are different, this is expected. > For future questions: Please post the console output in your mail, > do not use external resources and please (only) test current FFmpeg > git head, not a two-year old version. > > Carl Eugen > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
