Hello Carl, > Please test current FFmpeg git head, if the issue is reproducible > provide an input sample.
I tested with current git and the results were the same. As noticed by Moritz at the output of ffprobe $ ffprobe part1.mp4 ffprobe version N-98341-gcca982ee01 Copyright (c) 2007-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --toolchain=hardened --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 55.100 / 56. 55.100 libavcodec 58. 93.100 / 58. 93.100 libavformat 58. 47.100 / 58. 47.100 libavdevice 58. 11.100 / 58. 11.100 libavfilter 7. 86.100 / 7. 86.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'part1.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.47.100 Duration: 00:00:13.54, start: 12.666016, bitrate: 316 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1366x768 [SAR 1:1 DAR 683:384], 316 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default) Metadata: handler_name : VideoHandler the Duration and the start values are 13.54 and 12.66, respectively. It looks like that ffmpeg is not respecting "extract from 0 to 26" and instead doing something like "well, I will start at 12.6 and will stop at 26" Forcing with -copyinkf as suggested by Moritz, although the extracted part has, indeed, 26 seconds, there is only a "gray screen" from 0 to 12.6 and after that it plays well. The main.mp4 file plays normal. Kind regards, Leonardo _______________________________________________ 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". _______________________________________________ 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".