On 22-11-2019 07:23 pm, Carl Eugen Hoyos wrote:
Am 22.11.2019 um 13:01 schrieb <[email protected]> <[email protected]>:
time=00:00:04.44 bitrate=1889.4kbits/s dup=25 drop=0 speed= 8.7x
Audio and video do not have identical start times in your input file (this is
normal for transport streams). Our mov muxer does not support variable frame
rate, therefore frames have to be duplicated in the output to achieve A/V sync.
Are we looking at the same log? There's no audio being output. Only one
video stream. But that brings us to the culprit. The MOV muxer does
default to CFR mode but ffmpeg switches to VSCFR mode when there's only
one video stream being output with a non-zero first pts, In this mode,
the gap at the head of the stream will be filled.
Maybe the switch to vscfr shouldn't be automatic and instead be
user-selectable.
Gyan
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