Hi, Am 18.01.19 um 16:44 schrieb Carl Eugen Hoyos: >> You may be right. Technically I don't see an obstacle for a software >> player to feed the video display buffer with 50 half-frames per second, >> as most displays refresh rate is at least 50 per sec. > I do though. > (It is simply not possible, you can only send frames to your > driver / display.) Well, but the software player could send 50 frames per second with alternately updating only each 2nd top/bottom line.
> One possibility is to add "-f null -". Thanks! for the input vob I get: ======================= $ ffmpeg -i CYD_copy.vob -vf idet -f null - ffmpeg version 4.1-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2018 the FFmpeg developers built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516 [.....] Input #0, mpeg, from 'CYD_copy.vob': Duration: 01:16:20.74, start: 0.500000, bitrate: 7068 kb/s Stream #0:0[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 704x576 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc Stream mapping: Stream #0:1 -> #0:0 (mpeg2video (native) -> wrapped_avframe (native)) Stream #0:0 -> #0:1 (ac3 (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: encoder : Lavf58.20.100 Stream #0:0: Video: wrapped_avframe, yuv420p, 704x576 [SAR 12:11 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.35.100 wrapped_avframe Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Metadata: encoder : Lavc58.35.100 pcm_s16le [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 881664 >= 881664 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 463 >= 463 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 930816 >= 930816 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 1732608 >= 1731073 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 906 >= 906 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 909 >= 909 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 1761792 >= 1761792 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 1855488 >= 1855488 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 2941440 >= 2941440 [.....] [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 218113536 >= 218113536 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 113606 >= 113606 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 219217920 >= 219217920 [null @ 0x6afafc0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 114181 >= 114181 frame=114684 fps=114 q=-0.0 Lsize=N/A time=01:16:20.72 bitrate=N/A speed=4.53x video:60030kB audio:860178kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown [Parsed_idet_0 @ 0x6e71900] Repeated Fields: Neither:114683 Top: 1 Bottom: 0 [Parsed_idet_0 @ 0x6e71900] Single frame detection: TFF: 18738 BFF: 12770 Progressive: 42496 Undetermined: 40680 [Parsed_idet_0 @ 0x6e71900] Multi frame detection: TFF: 36759 BFF: 19705 Progressive: 58193 Undetermined: 27 for the output mp4 I get: ======================= $ ffmpeg -i CYD_atadenoise_H.264_mp3-q4.mp4 -vf idet -f null - [.....] Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'CYD_atadenoise_H.264_mp3-q4.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf57.83.100 Duration: 01:16:20.42, start: 0.000000, bitrate: 1403 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 704x576 [SAR 12:11 DAR 4:3], 1276 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 119 kb/s (default) Metadata: handler_name : SoundHandler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native)) Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.20.100 Stream #0:0(und): Video: wrapped_avframe, yuv420p, 704x576 [SAR 12:11 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.35.100 wrapped_avframe Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: handler_name : SoundHandler encoder : Lavc58.35.100 pcm_s16le frame=114502 fps=112 q=-0.0 Lsize=N/A time=01:16:20.08 bitrate=N/A speed= 4.5x video:59935kB audio:860018kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown [Parsed_idet_0 @ 0x5e49d00] Repeated Fields: Neither:114501 Top: 1 Bottom: 0 [Parsed_idet_0 @ 0x5e49d00] Single frame detection: TFF: 11649 BFF: 8023 Progressive: 78542 Undetermined: 16288 [Parsed_idet_0 @ 0x5e49d00] Multi frame detection: TFF: 14215 BFF: 8454 Progressive: 91824 Undetermined: 9 How do I interpret this data? There is 1 top frame, 0 bottom. Are these videos interlaced? Also not, that there is 50 tbc for the input and 25 tbc for the output. -Ulf _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
