#10297: Wrong WEBM length for .mkv to .webm conversion. -------------------------------------+------------------------------------- Reporter: rfulton88 | Owner: (none) Type: defect | Status: new Priority: normal | Component: | undetermined Version: unspecified | Resolution: Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Comment (by rfulton88): D:\Apps\ffmpeg\bin> ffmpeg -ss 4236.5 -t 3.90 -i "D:\Apps\ffmpeg\bin\black.adam.4k.mkv" -c:v vp9 -c:a libvorbis troubleshooting.webm ffmpeg version N-110129-gd2e1389285-20230331 Copyright (c) 2000-2023 the FFmpeg developers built with gcc 12.2.0 (crosstool-NG 1.25.0.152_89671bf) configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2 --disable-libfdk- aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libkvazaar --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --disable-libmfx --enable-libvpl --enable-openal --enable-libopencore- amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable- schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable- libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable- libxvid --enable-libzimg --enable-libzvbi --extra- cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20230331 libavutil 58. 5.100 / 58. 5.100 libavcodec 60. 7.101 / 60. 7.101 libavformat 60. 4.101 / 60. 4.101 libavdevice 60. 2.100 / 60. 2.100 libavfilter 9. 5.100 / 9. 5.100 libswscale 7. 2.100 / 7. 2.100 libswresample 4. 11.100 / 4. 11.100 libpostproc 57. 2.100 / 57. 2.100 Input #0, matroska,webm, from 'D:\Apps\ffmpeg\bin\black.adam.4k.mkv': Metadata: encoder : libebml v1.4.0 + libmatroska v1.6.1 Duration: 02:04:50.34, start: 0.000000, bitrate: 25146 kb/s Stream #0:0(eng): Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1606 [SAR 1:1 DAR 1920:803], 23.98 fps, 23.98 tbr, 1k tbn (default) Metadata: BPS-eng : 24375837 DURATION-eng : 02:04:50.316000000 NUMBER_OF_FRAMES-eng: 179588 NUMBER_OF_BYTES-eng: 22822841136 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:1(eng): Audio: eac3 (Dolby Digital Plus + Dolby Atmos), 48000 Hz, 5.1(side), fltp, 768 kb/s (default) Metadata: BPS-eng : 768000 DURATION-eng : 02:04:50.336000000 NUMBER_OF_FRAMES-eng: 234073 NUMBER_OF_BYTES-eng: 719072256 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:2(eng): Subtitle: subrip Metadata: title : English BPS-eng : 80 DURATION-eng : 02:00:13.500000000 NUMBER_OF_FRAMES-eng: 1771 NUMBER_OF_BYTES-eng: 72265 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:3(eng): Subtitle: subrip (default) (forced) Metadata: title : English [Forced] BPS-eng : 2 DURATION-eng : 01:42:52.714000000 NUMBER_OF_FRAMES-eng: 76 NUMBER_OF_BYTES-eng: 1649 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:4(ara): Subtitle: subrip Metadata: title : Arabic BPS-eng : 63 DURATION-eng : 02:03:36.541000000 NUMBER_OF_FRAMES-eng: 1260 NUMBER_OF_BYTES-eng: 58459 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:5(chi): Subtitle: subrip Metadata: title : Chinese Yue BPS-eng : 38 DURATION-eng : 02:03:36.541000000 NUMBER_OF_FRAMES-eng: 1264 NUMBER_OF_BYTES-eng: 35519 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:6(fre): Subtitle: subrip Metadata: title : French BPS-eng : 37 DURATION-eng : 02:03:36.500000000 NUMBER_OF_FRAMES-eng: 1294 NUMBER_OF_BYTES-eng: 35166 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:7(kor): Subtitle: subrip Metadata: title : Korean BPS-eng : 40 DURATION-eng : 01:56:29.656000000 NUMBER_OF_FRAMES-eng: 1254 NUMBER_OF_BYTES-eng: 35315 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:8(spa): Subtitle: subrip Metadata: title : Latin America Spanish BPS-eng : 43 DURATION-eng : 02:03:36.541000000 NUMBER_OF_FRAMES-eng: 1258 NUMBER_OF_BYTES-eng: 40278 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:9(por): Subtitle: subrip Metadata: title : Portuguese Brazilian BPS-eng : 43 DURATION-eng : 02:03:36.791000000 NUMBER_OF_FRAMES-eng: 1237 NUMBER_OF_BYTES-eng: 39945 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> vp9 (libvpx-vp9)) Stream #0:1 -> #0:1 (eac3 (native) -> vorbis (libvorbis)) Stream #0:2 -> #0:2 (subrip (srt) -> webvtt (native)) Press [q] to stop, [?] for help [libvpx-vp9 @ 0000025993392940] v1.13.0 [libvpx-vp9 @ 0000025993392940] Neither bitrate nor constrained quality specified, using default CRF of 32 Output #0, webm, to 'troubleshooting.webm': Metadata: encoder : Lavf60.4.101 Stream #0:0(eng): Video: vp9, yuv420p10le(tv, bt2020nc/bt2020/smpte2084, progressive), 3840x1606 [SAR 1:1 DAR 1920:803], q=2-31, 23.98 fps, 1k tbn (default) Metadata: BPS-eng : 24375837 DURATION-eng : 02:04:50.316000000 NUMBER_OF_FRAMES-eng: 179588 NUMBER_OF_BYTES-eng: 22822841136 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES encoder : Lavc60.7.101 libvpx-vp9 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A Stream #0:1(eng): Audio: vorbis, 48000 Hz, 5.1(side), fltp (default) Metadata: BPS-eng : 768000 DURATION-eng : 02:04:50.336000000 NUMBER_OF_FRAMES-eng: 234073 NUMBER_OF_BYTES-eng: 719072256 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES encoder : Lavc60.7.101 libvorbis Stream #0:2(eng): Subtitle: webvtt Metadata: title : English BPS-eng : 80 DURATION-eng : 02:00:13.500000000 NUMBER_OF_FRAMES-eng: 1771 NUMBER_OF_BYTES-eng: 72265 _STATISTICS_WRITING_APP-eng: mkvmerge v49.0.0 ('Sick Of Losing Soulmates') 64-bit _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES encoder : Lavc60.7.101 webvtt frame= 94 fps=0.3 q=32.0 Lsize= 888kB time=00:50:12.01 bitrate= 2.4kbits/s speed=8.79x video:728kB audio:105kB subtitle:17kB other streams:0kB global headers:7kB muxing overhead: 4.376228% -- Ticket URL: <https://trac.ffmpeg.org/ticket/10297#comment:1> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

#10297: Wrong WEBM length for .mkv to .webm conversion. -------------------------------------+---------------------------------- Reporter: rfulton88 | Owner: (none) Type: defect | Status: new Priority: normal | Component: ffmpeg Version: unspecified | Resolution: Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+---------------------------------- Changes (by rfulton88): * component: undetermined => ffmpeg Old description:

Summary of the bug: How to reproduce:

{{{ % ffmpeg -ss 4236.5 -t 3.90 -i "D:\Apps\ffmpeg\bin\black.adam.4k.mkv" -c:v vp8 -c:a libvorbis meme.webm ffmpeg version N-110129-gd2e1389285-20230331 Copyright (c) 2000-2023 the FFmpeg developers }}}

New description: Summary of the bug: MKV to WEBM conversion that should be 3.9 seconds long is 50 minutes. How to reproduce: {{{ % ffmpeg -ss 4236.5 -t 3.90 -i "D:\Apps\ffmpeg\bin\black.adam.4k.mkv" -c:v vp8 -c:a libvorbis meme.webm ffmpeg version N-110129-gd2e1389285-20230331 Copyright (c) 2000-2023 the FFmpeg developers }}} -- -- Ticket URL: <https://trac.ffmpeg.org/ticket/10297#comment:3> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

#10297: Wrong WEBM length for .mkv to .webm conversion. -------------------------------------+---------------------------------- Reporter: rfulton88 | Owner: (none) Type: defect | Status: new Priority: normal | Component: ffmpeg Version: unspecified | Resolution: Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+---------------------------------- Comment (by rfulton88): Replying to [comment:4 mkver]:

wellido.webm contains subtitles in the range of 2.643 to 50:12.015 (+3.202s duration). Seems like the -t is not applied to it.

Is there anything I can do about that? -- Ticket URL: <https://trac.ffmpeg.org/ticket/10297#comment:5> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker