On Tue, Dec 17, 2019 at 03:15:09PM +0200, Martin Storsjö wrote: > Keep all the existing data fields as they are (there's lots and > lots of nontrivial calculation and heuristics based on them in > their current form), but derive the duration as the difference > between the pts of the first packet to the maximum pts+duration > (not necessarily the last packet); use this duration in any box > where the actual presentation duration is supposed to be. > > Fixes: 8420 > --- > Fixed to fetch the duration for tmcd tracks from their designated > source track. > --- > libavformat/movenc.c | 35 ++++++++++++++++++++++++++++------- > 1 file changed, 28 insertions(+), 7 deletions(-)
I found another case that changes, again dont know which is more correct make -j12 && ./ffmpeg -i ~/tickets/3453/mov_with_tmcd.mov -y -bitexact -codec copy -map 0 -t 2 file.mov ; ./ffprobe -v 0 file.mov -show_packets -print_format compact > /tmp/before --- /tmp/before 2019-12-20 23:28:04.009327038 +0100 +++ /tmp/after 2019-12-20 23:27:17.213326052 +0100 @@ -188,7 +188,7 @@ packet|codec_type=audio|stream_index=1|pts=88320|pts_time=1.840000|dts=88320|dts_time=1.840000|duration=1024|duration_time=0.021333|convergence_duration=N/A|convergence_duration_time=N/A|size=4096|pos=408905|flags=K_ packet|codec_type=data|stream_index=2|pts=46|pts_time=1.840000|dts=46|dts_time=1.840000|duration=1|duration_time=0.040000|convergence_duration=N/A|convergence_duration_time=N/A|size=4|pos=413001|flags=K_ packet|codec_type=audio|stream_index=1|pts=89344|pts_time=1.861333|dts=89344|dts_time=1.861333|duration=896|duration_time=0.018667|convergence_duration=N/A|convergence_duration_time=N/A|size=3584|pos=413005|flags=K_ -packet|codec_type=video|stream_index=0|pts=26624|pts_time=2.080000|dts=24064|dts_time=1.880000|duration=512|duration_time=0.040000|convergence_duration=N/A|convergence_duration_time=N/A|size=776|pos=416589|flags=_D +packet|codec_type=video|stream_index=0|pts=26624|pts_time=2.080000|dts=24064|dts_time=1.880000|duration=512|duration_time=0.040000|convergence_duration=N/A|convergence_duration_time=N/A|size=776|pos=416589|flags=__ packet|codec_type=audio|stream_index=1|pts=90240|pts_time=1.880000|dts=90240|dts_time=1.880000|duration=1024|duration_time=0.021333|convergence_duration=N/A|convergence_duration_time=N/A|size=4096|pos=417365|flags=K_ packet|codec_type=data|stream_index=2|pts=47|pts_time=1.880000|dts=47|dts_time=1.880000|duration=1|duration_time=0.040000|convergence_duration=N/A|convergence_duration_time=N/A|size=4|pos=421461|flags=K_ packet|codec_type=audio|stream_index=1|pts=91264|pts_time=1.901333|dts=91264|dts_time=1.901333|duration=896|duration_time=0.018667|convergence_duration=N/A|convergence_duration_time=N/A|size=3584|pos=421465|flags=K_ file should be here: https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket3453/ [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Awnsering whenever a program halts or runs forever is On a turing machine, in general impossible (turings halting problem). On any real computer, always possible as a real computer has a finite number of states N, and will either halt in less than N cycles or never halt.
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