Hi, I'm working with HDV tape transfers in the moment and dealing with m2t transport streams. I've found that using ffmpeg -report -loglevel debug -i input -f null - has been great at catching corrupt frames that I can investigate in playback software. I just realised that this can be done even quicker and it looks like the same corruption is detected when using -c copy. However, the report I get in the terminal just uses dts values - is there a way to convert these dts values to a frame number or preferably a HH:MM:SS:FF value? is it related to the tbn/tbc value? Either in ffmpeg or even some scriptable way.
For example, one of the errors displays like this: [mpegts @ 00000165bdcd34c0] Packet corrupt (stream = 1, dts = 332636400) and I can tell from using -f null - that this corresponds to approx 01:01:33.55 , but I can't find a way to get the dts value to relate to that timestamp. ffmpeg -i 2.m2t -c copy -f null - ffmpeg version N-96643-g2942b00285-g2383021a7a+1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.2.0 (Rev2, Built by MSYS2 project) configuration: --disable-autodetect --enable-amf --enable-bzlib --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-iconv --enable-lzma --enable-nvenc --enable-zlib --enable-sdl2 --enable-ffnvcodec --enable-nvdec --enable-cuda-llvm --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libx264 --enable-libdav1d --disable-debug --enable-fontconfig --enable-libass --enable-libbluray --enable-libfreetype --enable-libmfx --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libwavpack --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libshine --enable-gpl --enable-avisynth --enable-libxvid --enable-libaom --enable-libopenmpt --enable-version3 --enable-openssl --extra-cflags=-DLIBTWOLAME_STATIC --extra-libs=-lstdc++ --extra-cflags=-DLIBXML_STATIC --extra-libs=-liconv --enable-nonfree libavutil 56. 39.100 / 56. 39.100 libavcodec 58. 67.101 / 58. 67.101 libavformat 58. 37.100 / 58. 37.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 74.100 / 7. 74.100 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 [mpegts @ 00000180e65c24c0] PES packet size mismatch [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 1, dts = 437428800). [mpegts @ 00000180e65c24c0] Could not find codec parameters for stream 2 (Unknown: none ([160][0][0][0] / 0x00A0)): unknown codec Consider increasing the value for the 'analyzeduration' and 'probesize' options [mpegts @ 00000180e65c24c0] Could not find codec parameters for stream 3 (Unknown: none ([161][0][0][0] / 0x00A1)): unknown codec Consider increasing the value for the 'analyzeduration' and 'probesize' options Input #0, mpegts, from '82.m2t': Duration: 01:20:57.08, start: 3.440000, bitrate: 26122 kb/s Program 100 Stream #0:0[0x810]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x814]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s Stream #0:2[0x815]: Unknown: none ([160][0][0][0] / 0x00A0) Stream #0:3[0x811]: Unknown: none ([161][0][0][0] / 0x00A1) Output #0, null, to 'pipe:': Metadata: encoder : Lavf58.37.100 Stream #0:0: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], q=2-31, 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 90k tbc Stream #0:1: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 0, dts = 5317200). [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 0, dts = 10821600). [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 0, dts = 116416800).322x [mpegts @ 00000180e65c24c0] PES packet size mismatch [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 1, dts = 116398800). [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 0, dts = 332654400).341x [mpegts @ 00000180e65c24c0] PES packet size mismatch [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 1, dts = 332636400). [mpegts @ 00000180e65c24c0] PES packet size mismatch04 bitrate=N/A speed= 345x [mpegts @ 00000180e65c24c0] Packet corrupt (stream = 1, dts = 437428800). frame=121338 fps=8612 q=-1.0 Lsize=N/A time=01:20:57.04 bitrate=N/A speed= 345x video:14811578kB audio:227500kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Best, Kieran O'Leary Irish Film Institute _______________________________________________ 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".