Thanks Moritz.
Still the same issue though with mkv.
However I used to see a lot of warnings like
[mp4 @ 0x556dc3300700] Non-monotonous DTS in output stream 0:0;
previous: 7456280, current: 7456278; changing to 7456281. This may
result in incorrect timestamps in the output file.
[mp4 @ 0x556dc3300700] Non-monotonous DTS in output stream 0:0;
previous: 7456281, current: 7456278; changing to 7456282. This may
result in incorrect timestamps in the output file.
[mp4 @ 0x556dc3300700] Non-monotonous DTS in output stream 0:0;
previous: 7456282, current: 7456278; changing to 7456283. This may
result in incorrect timestamps in the output file.
by using mp4 container, and they were gone with mkv.
On 2020-01-10 3:38 p.m., Moritz Barsnick wrote:
On Fri, Jan 10, 2020 at 15:06:12 -0500, Sean Feng wrote:
I have a mp4 video which is in VFR, and also a few negative frames
before I cut it from another video. So the PTS of this video looks like
this
[...]
The problem is, when I use a media player to play the output video, I
can see some of frames felt into the same timestamp. What I mean is the
frame itself has the correct PTS as they had been drawn, however the
timestamp of video isn't correct. If I get the PTS of the output video,
I see this
pts_time=0.000000
pts_time=0.000000
pts_time=0.251053
pts_time=0.251053
pts_time=0.251054
pts_time=0.251054
As I understand, ffmpeg is not capable of writing fully compliant VFR
MP4 files. This is probably a side effect of this.
If you write to a different container, suck as MKV, it should work.
Cheers,
Moritz
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