#2084: Wrong duration and negative bitrate in mpeg stream with timestamp discontinuity -------------------------------------+------------------------------------- Reporter: cehoyos | Owner: Type: defect | Status: new Priority: normal | Component: Version: git- | undetermined master | Keywords: mpegps Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 -------------------------------------+------------------------------------- A user provided a 2.9 G DVD rip that shows a duration of "00:00:01.06" and a bitrate of "-2147483 kb/s" with ffmpeg -i. The reason is a timestamp discontinuity approximately 1 sec before the end of the stream. I cut the sample to only contain the last seconds, and the duration is also wrong, the bitrate is shown as 0kb/s. {{{ $ ffmpeg -i negative-bitrate-sample.mpg ffmpeg version N-48311-gc36302a Copyright (c) 2000-2012 the FFmpeg developers built on Dec 30 2012 19:01:34 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl --enable-avresample libavutil 52. 13.100 / 52. 13.100 libavcodec 54. 81.100 / 54. 81.100 libavformat 54. 50.104 / 54. 50.104 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 30.102 / 3. 30.102 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 [mpeg @ 0x1ed7540] max_analyze_duration 5000000 reached at 5000000 Input #0, mpeg, from 'negative-bitrate-sample.mpg': Duration: 00:00:01.06, start: 0.287267, bitrate: -2147483 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s Stream #0:2[0x23]: Subtitle: dvd_subtitle At least one output file must be specified }}} {{{ $ ffmpeg -probesize 2147483647 -analyzeduration 2147483647 -i ../MPlayer /negative-bitrate-sample.mpg ffmpeg version N-48311-gc36302a Copyright (c) 2000-2012 the FFmpeg developers built on Dec 30 2012 19:01:34 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl --enable-avresample libavutil 52. 13.100 / 52. 13.100 libavcodec 54. 81.100 / 54. 81.100 libavformat 54. 50.104 / 54. 50.104 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 30.102 / 3. 30.102 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 [mpeg @ 0x17c0720] max_analyze_duration 2147483647 reached at 2147520000 Input #0, mpeg, from '../MPlayer/negative-bitrate-sample.mpg': Duration: 00:00:01.06, start: 0.287267, bitrate: -2147483 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s Stream #0:2[0x23]: Subtitle: dvd_subtitle Stream #0:3[0x21]: Subtitle: dvd_subtitle Stream #0:4[0x20]: Subtitle: dvd_subtitle Stream #0:5[0x22]: Subtitle: dvd_subtitle At least one output file must be specified }}} {{{ $ ffmpeg -i negative-bitrate-sample_cut.mpg ffmpeg version N-48311-gc36302a Copyright (c) 2000-2012 the FFmpeg developers built on Dec 30 2012 19:01:34 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl --enable-avresample libavutil 52. 13.100 / 52. 13.100 libavcodec 54. 81.100 / 54. 81.100 libavformat 54. 50.104 / 54. 50.104 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 30.102 / 3. 30.102 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 [mpeg2video @ 0x2b72f80] mpeg_decode_postinit() failure Last message repeated 4 times [mpeg @ 0x2b6c540] DTS discontinuity in stream 1: packet 76 with DTS 343638654, packet 77 with DTS 8589956846 [mpeg @ 0x2b6c540] DTS discontinuity in stream 0: packet 104 with DTS 343641534, packet 105 with DTS 8589960446 Input #0, mpeg, from 'negative-bitrate-sample_cut.mpg': Duration: 25:27:10.12, start: 3814.943267, bitrate: 0 kb/s Stream #0:0[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:2[0x20]: Subtitle: dvd_subtitle Stream #0:3[0x21]: Subtitle: dvd_subtitle Stream #0:4[0x22]: Subtitle: dvd_subtitle Stream #0:5[0x23]: Subtitle: dvd_subtitle At least one output file must be specified }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2084> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker