On Sun, Aug 30, 2020 at 03:44:15PM -0600, Mike Brown wrote: > On Sun, Aug 30, 2020 at 09:36:42PM +0200, Carl Eugen Hoyos wrote: > > Am So., 30. Aug. 2020 um 21:32 Uhr schrieb Mike Brown <m...@skew.org>: > > > > > > I'm using a Zeranoe 64-bit Windows build, ffmpeg version > > > git-2020-06-28-4cfcfb3 on Win7. > > > > > > I am trying to split DV-AVI files, using > > > https://trac.ffmpeg.org/wiki/Seeking as my guide. > > > For example, I want to extract a segment from 4h54m24s to 4h57m08s into > > > its own file. > > > > > > The following syntax works great, but is, as promised by the wiki, > > > painfully slow: > > > > > > ffmpeg -i splitme.avi -ss 4:54:24 -t 2:44 -c copy -y out.avi > > > > > > The wiki suggests that the following should work too, but much faster: > > > > > > ffmpeg -ss 4:54:24 -i splitme.avi -t 2:44 -c copy -y out.avi > > > > > > It definitely starts fast, but unexpectedly, it produces a segment from > > > 0:08:21 to, well, I don't know because my disk filled up, so it was many > > > hours > > > long! > > > > > > Am I doing something wrong? > > > > Complete, uncut console output missing. > > (Feel free to press q before your disk is full.) > > OK, I pressed q after 11900 frames (requested duration 2:44 should only yield > ~4915 frames). I've also tried this same command line with more verbose time > specs (04:54:24.0 and 00:02:44.0), but it made no difference. > > I:\video workspace\captures>ffmpeg -loglevel debug -ss 4:54:24 -i splitme.avi > -t 2:44 -c copy -y 34.avi > ffmpeg version git-2020-06-28-4cfcfb3 Copyright (c) 2000-2020 the FFmpeg > developers > built with gcc 9.3.1 (GCC) 20200621 > configuration: --enable-gpl --enable-version3 --enable-sdl2 > --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass > --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame > --enable-libopencore-amrnb --enable-libopencore- > amrwb --enable-libopenjpeg --enable-libopus --enable-libshine > --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora > --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp > --enable-libx264 --enable-libx265 --enable-libxml > 2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp > --enable-libvidstab --enable-libvmaf --enable-libvorbis > --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid > --enable-libaom --enable-libgsm --disable-w32threads --enable > -libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va > --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth > --enable-libopenmpt --enable-amf > 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 > libswscale 5. 8.100 / 5. 8.100 > libswresample 3. 8.100 / 3. 8.100 > libpostproc 55. 8.100 / 55. 8.100 > Splitting the commandline. > Reading option '-loglevel' ... matched as option 'loglevel' (set logging > level) with argument 'debug'. > Reading option '-ss' ... matched as option 'ss' (set the start time offset) > with argument '4:54:24'. > Reading option '-i' ... matched as input url with argument 'splitme.avi'. > Reading option '-t' ... matched as option 't' (record or transcode "duration" > seconds of audio/video) with argument '2:44'. > Reading option '-c' ... matched as option 'c' (codec name) with argument > 'copy'. > Reading option '-y' ... matched as option 'y' (overwrite output files) with > argument '1'. > Reading option '34.avi' ... matched as output url. > Finished splitting the commandline. > Parsing a group of options: global . > Applying option loglevel (set logging level) with argument debug. > Applying option y (overwrite output files) with argument 1. > Successfully parsed a group of options. > Parsing a group of options: input url splitme.avi. > Applying option ss (set the start time offset) with argument 4:54:24. > Successfully parsed a group of options. > Opening an input file: splitme.avi. > [NULL @ 0000000000448580] Opening 'splitme.avi' for reading > [file @ 0000000000449e80] Setting default whitelist 'file,crypto,data' > [avi @ 0000000000448580] Format avi probed with size=2048 and score=100 > [avi @ 000000000044a080] use odml:1 > [avi @ 0000000000448580] ODML index invalid > st:1 removing common factor 4 from timebase > [avi @ 0000000000448580] ODML index invalid > [avi @ 0000000000448580] Before avformat_find_stream_info() pos: 34816 bytes > read:688128 seeks:6 nb_streams:2 > [avi @ 0000000000448580] parser not found for codec dvvideo, packets or times > may be invalid. > [avi @ 0000000000448580] parser not found for codec pcm_s16le, packets or > times may be invalid. > [avi @ 0000000000448580] parser not found for codec dvvideo, packets or times > may be invalid. > [avi @ 0000000000448580] parser not found for codec pcm_s16le, packets or > times may be invalid. > [avi @ 0000000000448580] All info found > [avi @ 0000000000448580] After avformat_find_stream_info() pos: 158928 bytes > read:840904 seeks:6 frames:2 > Guessed Channel Layout for Input Stream #0.1 : stereo > Input #0, avi, from 'splitme.avi': > Duration: 06:33:11.37, start: 0.000000, bitrate: 30315 kb/s > Stream #0:0, 1, 1001/30000: Video: dvvideo, 1 reference frame (dvsd / > 0x64737664), yuv411p(topleft), 720x480 [SAR 8:9 DAR 4:3], 0/1, 29.97 fps, > 29.97 tbr, 29.97 tbn, 29.97 tbc > Stream #0:1, 1, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 > Hz, stereo, s16, 1536 kb/s > Successfully opened the file. > Parsing a group of options: output url 34.avi. > Applying option t (record or transcode "duration" seconds of audio/video) > with argument 2:44. > Applying option c (codec name) with argument copy. > Successfully parsed a group of options. > Opening an output file: 34.avi. > [file @ 0000000000451740] Setting default whitelist 'file,crypto,data' > Successfully opened the file. > [avi @ 00000000004b6800] reserve_index_space:0 master_index_max_size:256 > [avi @ 00000000004b6800] duration_est:164.000, filesize_est:0.0GiB, > master_index_max_size:256 > Output #0, avi, to '34.avi': > Metadata: > ISFT : Lavf58.47.100 > Stream #0:0, 0, 1001/30000: Video: dvvideo, 1 reference frame (dvsd / > 0x64737664), yuv411p(topleft), 720x480 (0x0) [SAR 8:9 DAR 4:3], 0/1, q=2-31, > 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc > Stream #0:1, 0, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 > Hz, stereo, s16, 1536 kb/s > Stream mapping: > Stream #0:0 -> #0:0 (copy) > Stream #0:1 -> #0:1 (copy) > Press [q] to stop, [?] for help > cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if > it occurs once at the start per stream) > cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if > it occurs once at the start per stream) > Last message repeated 1 times > frame=11962 fps=262 q=-1.0 Lsize= 1477592kB time=-04:39:24.41 bitrate=N/A > speed=N/A > video:1401797kB audio:74827kB subtitle:0kB other streams:0kB global > headers:0kB muxing overhead: 0.065605% > Input file #0 (splitme.avi): > Input stream #0:0 (video): 11962 packets read (1435440000 bytes); > Input stream #0:1 (audio): 23922 packets read (76622432 bytes); > Total: 35884 packets (1512062432 bytes) demuxed > Output file #0 (34.avi): > Output stream #0:0 (video): 11962 packets muxed (1435440000 bytes); > Output stream #0:1 (audio): 23922 packets muxed (76622432 bytes); > Total: 35884 packets (1512062432 bytes) muxed > 0 frames successfully decoded, 0 decoding errors > [AVIOContext @ 0000000000451880] Statistics: 38 seeks, 5801 writeouts > [AVIOContext @ 0000000000452100] Statistics: 1513187688 bytes read, 10 seeks
Any thoughts on this? User error? > frame=11962 fps=262 q=-1.0 Lsize= 1477592kB time=-04:39:24.41 bitrate=N/A > speed=N/A Negative time here seems weird ^^^^^^^^^^^^ Let me know what I can do to help diagnose. _______________________________________________ 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".