On Sun, Nov 12, 2023 at 8:36 AM Mark Filipak <markfilipak.i...@gmail.com> wrote:
> Previous Subject: "rewrite tags in a source's PES headers -- How?" > > On 11/11/23 13:41, Paul B Mahol wrote: > > On Sat, Nov 11, 2023 at 7:29 PM Mark Filipak <markfilipak.i...@gmail.com > > > > wrote: > > > >> Here's what I'm doing: > >> -bsf:v setts=time_base=1/24000:pts=N*1001:dts=N*1001 > >> > >> Here's the result: > >> frame pts dts > >> 0 0 2002 <= should be 0 > >> 1 3003 <= should be 1001 3003 <= should be 1001 > >> 2 4004 <= should be 2002 4004 <= should be 2002 > >> 3 2002 <= should be 3003 5005 <= should be 3003 > >> 4 5005 <= should be 4004 6006 <= should be 4004 > >> 5 1001 <= should be 5005 7007 <= should be 5005 > >> 6 8008 <= should be 6006 8008 <= should be 6006 > >> 7 9009 <= should be 7007 9009 <= should be 7007 > >> 8 7007 <= should be 8008 10010 <= should be 8008 > >> 9 10010 <= should be 9009 11011 <= should be 9009 > >> 10 6006 <= should be 10010 12012 <= should be 10010 > >> 11 13013 <= should be 11011 13013 <= should be 11011 > >> 12 12012 <= should be 12012 14014 <= should be 12012 > >> 13 14014 <= should be 13013 15015 <= should be 13013 > >> 14 11011 <= should be 14014 16016 <= should be 14014 > >> 15 17017 <= should be 15015 17017 <= should be 15015 > >> 16 18018 <= should be 16016 18018 <= should be 16016 > >> > >> The source video is 'NTSC'-soft. > >> Can this be explained? > >> Can it be countered? > >> > >> PTSs in frames 1..5 are +2 +2 -1 +1 -4 > >> PTSs in frames 6..10 are +2 +2 -1 +1 -4 > >> PTSs in frames 11..15 are +2 +0 +1 -3 +2 > >> I'm baffled. > >> > > > > N is packet number, and it goes in different order. > > Oh, yes, out of order/out of sequence. > > > Can be confirmed with: > > > > ffmpeg -i <video> -c copy -f framecrc - > > Thank you, Paul. Good of you. How do I interpret the framecrc table? > > stream_index packet_duration > | packet_dts | packet_size > | | packet_pts | | 0xCRC > | |________ |_________________ |___ |____ |_________ > 1 0 0 2880 768 0xb16c8010 > 1 2880 2880 2880 768 0x1b728309 > 1 5760 5760 2880 768 0x966977f8 > 1 8640 8640 2880 768 0x6e078511 > 0 10878 22890 3003 62500 0x5877c6d3 > 1 11520 11520 2880 768 0xe49b880c > [framecrc@ 0000000002a9b140] Timestamps are unset ... stream 0 ... > 1 14400 14400 2880 768 0x0a217046 > 0 15382 15382 3003 18300 0xd4f063a2 F=0x0 > 1 17280 17280 2880 768 0xc13a7e27 > 0 18385 18385 4504 17924 0x14ae7839 F=0x0 > 1 20160 20160 2880 768 0x91017a25 > 0 22890 0x8000000000000000 4504 37160 0xa54ad420 F=0x0 > 1 23040 23040 2880 768 0xcd087be2 > 0 25893 25893 4504 18920 0x6230931b F=0x0 > 1 25920 25920 2880 768 0xca8a79b6 > 1 28800 28800 2880 768 0x1d5e7a84 > 0 30398 30398 3003 17172 0xebbc5af9 F=0x0 > 1 31680 31680 2880 768 0x1c3e7f7d > 0 33401 0x8000000000000000 3003 33636 0x2bf50e31 F=0x0 > 1 34560 34560 2880 768 0x815d7b63 > 1 37440 37440 2880 768 0x1ac6762d > 0 37905 37905 3003 16144 0x5fabbc96 F=0x0 > 1 40320 40320 2880 768 0x7e2f8d29 > 0 40908 40908 4504 14960 0xe0a8abb9 F=0x0 > 1 43200 43200 2880 768 0x951c8f4c > 0 45412 0x8000000000000000 4504 34072 0x6bf61d8c F=0x0 > 1 46080 46080 2880 768 0xf42e82a7 > 0 48415 48415 4504 14788 0xcc5c4f38 F=0x0 > : : : : : : > 0 136171401 136171401 3003 23924 0xe65b80f5 F=0x0 > 1 136172160 136172160 2880 768 0x3b687c8c > 0 136174404 0x8000000000000000 3003 52328 0x7a17da08 F=0x0 > 0 136178908 136178908 3003 23932 0x5bee6d60 F=0x0 > 0 136181911 136181911 4504 23452 0xc4a6eb3a F=0x0 > > Why is the above so different from the packets VOBEdit shows and that I > manually parse? > I thought all VOB packets were 2048 bytes. > Are the packets above a different type of packet? > > Again, lacks of deeper understanding of FFmpeg subject. The above command demuxes all packets, including audio/video/subtitle. > The video is 'NTSC'-soft (24/1.001fps). '3003' means ffprobe 'sees' > 30/1.001fps. > How can I stop the decoder doing telecine? > No decoder does telecine. > > Cheers > --Mark. > > _______________________________________________ > 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". > _______________________________________________ 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".