Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread Rob Hallam
On Tue, 22 Jun 2021 at 17:52, Carl Zwanzig wrote: > > On 6/22/2021 9:26 AM, Rob Hallam wrote: > > Is that always true? When I have tried (eg [1]) the second input > > starts*after* the first, easiest to see with eg testsrc filter. > > No time to try this at the moment, but might that be an

Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread Carl Zwanzig
On 6/22/2021 9:26 AM, Rob Hallam wrote: Is that always true? When I have tried (eg [1]) the second input starts*after* the first, easiest to see with eg testsrc filter. No time to try this at the moment, but might that be an artifact of using the lavfi device? I wouldn't think so, but maybe.

Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread Rob Hallam
On Tue, 22 Jun 2021 at 16:53, Carl Zwanzig wrote: > Something else to consider is that all inputs start at the same time, so if > you want to fade between two clips, you have to pad or delay the second so > that it starts at the beginning of the fade. There will be examples of this > if you

Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread Carl Zwanzig
Please do not top-post in this list. On 6/22/2021 12:39 AM, ibur...@compuscience.com wrote: However, now that I understand that for 4 seconds transition you need 4 seconds on each video, Anyways, may be we can improve the documentation to explain that offset need to be such to allow

Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread iburman
I see..., understood..Thanks! -Original Message- From: ffmpeg-user On Behalf Of Michael Koch Sent: Tuesday, June 22, 2021 10:54 AM To: ffmpeg-user@ffmpeg.org Subject: Re: [FFmpeg-user] How to improve result of transitions > However, now that I understand that for 4 seconds transit

Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread Michael Koch
However, now that I understand that for 4 seconds transition you need 4 seconds on each video, I don't understand why you need two parameters, duration and offset. Why not simply define the duration, and have ffmpeg calculate the offset as videoDuration minus transitionDuration? I think

Re: [FFmpeg-user] How to improve result of transitions

2021-06-22 Thread iburman
to create the transition. Again, thanks a lot for your help. -Original Message- From: ffmpeg-user On Behalf Of Rob Hallam Sent: Monday, June 21, 2021 11:46 PM To: FFmpeg user questions Subject: Re: [FFmpeg-user] How to improve result of transitions On Mon, 21 Jun 2021 at 21:07, wrote

Re: [FFmpeg-user] How to improve result of transitions

2021-06-21 Thread Rob Hallam
On Mon, 21 Jun 2021 at 21:07, wrote: > > Attached is a result of a transition using two videos, one totally black and > one totally white, using radial transition. > > Each video has 9 seconds and the transition command is: > > Ffmpeg -i black.mp4 -i white.mp4 -filter_complex >