#7442: WebVTT timestamp format incorrect when including more than zero and less than ten hours -------------------------------------+------------------------------------- Reporter: | Type: defect anonymous_coward | Priority: normal Status: new | Version: git- Component: avformat | master Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: WebVTT spec requires that, when hours are required, WebVTT timestamps should have two or more characters (ie be zero-padded like the other portions of the timestamp). https://www.w3.org/TR/webvtt1 /#webvtt-timestamp
webvttenc does not zero pad the hours part in webvtt_write_time. How to reproduce: {{{ % printf "1\n01:00:00.000 --> 01:01:00.000\nTest" | ffmpeg -y -f srt -i - -f webvtt test.webvtt ffmpeg version N-91807-ga77c2df Copyright (c) 2000-2018 the FFmpeg developers built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28) configuration: --prefix=/home/anonymous_coward/ffmpeg_build --pkg- config-flags=--static --extra- cflags=-I/home/anonymous_coward/ffmpeg_build/include --extra- ldflags=-L/home/anonymous_coward/ffmpeg_build/lib --extra-libs=-lpthread --extra-libs=-lm --bindir=/home/anonymous_coward/bin --enable-gpl --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libzvbi libavutil 56. 19.100 / 56. 19.100 libavcodec 58. 27.101 / 58. 27.101 libavformat 58. 18.100 / 58. 18.100 libavdevice 58. 4.101 / 58. 4.101 libavfilter 7. 26.100 / 7. 26.100 libswscale 5. 2.100 / 5. 2.100 libswresample 3. 2.100 / 3. 2.100 libpostproc 55. 2.100 / 55. 2.100 Input #0, srt, from 'pipe:': Duration: N/A, bitrate: N/A Stream #0:0: Subtitle: subrip Output #0, webvtt, to 'test.webvtt': Metadata: encoder : Lavf58.18.100 Stream #0:0: Subtitle: webvtt Metadata: encoder : Lavc58.27.101 webvtt Stream mapping: Stream #0:0 -> #0:0 (subrip (srt) -> webvtt (native)) size= 0kB time=01:00:00.00 bitrate= 0.0kbits/s speed=6.67e+07x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 925.000000% }}} Contents of test.webvtt should be {{{ WEBVTT 01:00:00.000 --> 01:01:00.000 Test }}} but are instead {{{ WEBVTT 1:00:00.000 --> 1:01:00.000 Test }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/7442> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker _______________________________________________ FFmpeg-trac mailing list FFmpeg-trac@avcodec.org http://ffmpeg.org/mailman/listinfo/ffmpeg-trac