Re: [FFmpeg-user] issue with concat and seek

2016-10-20 Thread Carles Vila
> > > Good point - I wasn't aware it would do it this way. (I'll need to play > around with this to understand, for myself.) > > I'm pretty sure the "inpoint" directive to the concat demuxer will then > suffer the same issue. Its documentation even says: > > This directive works best with intra f

Re: [FFmpeg-user] issue with concat and seek

2016-10-20 Thread Moritz Barsnick
On Wed, Oct 19, 2016 at 19:43:00 +0200, Cley Faye wrote: > To me, it sound like it might copy all the video, and set the stream to > start at the specified time, if there is no keyframe between the start and > the cutting point. If that's the case, then concat might not be honoring > this starting

Re: [FFmpeg-user] issue with concat and seek

2016-10-19 Thread Carles Vila
has solved the issue.. -Mensaje original- De: "Cley Faye" Enviado: ‎19/‎10/‎2016 19:43 Para: "FFmpeg user questions" Asunto: Re: [FFmpeg-user] issue with concat and seek 2016-10-19 17:51 GMT+02:00 Moritz Barsnick : > No, ffmpeg should actually cut with "-ss&

Re: [FFmpeg-user] issue with concat and seek

2016-10-19 Thread Cley Faye
2016-10-19 17:51 GMT+02:00 Moritz Barsnick : > No, ffmpeg should actually cut with "-ss". ​Hmm, I'm not sure. This wiki page (https://trac.ffmpeg.org/wiki/Seeking ) says: > Using -ss as input option together with -c:v copy might not be accurate since ffmpeg is forced to only use/split on i-frame

Re: [FFmpeg-user] issue with concat and seek

2016-10-19 Thread Moritz Barsnick
On Wed, Oct 19, 2016 at 17:17:20 +0200, Carles Vila wrote: > Normal concat without seeking works just fine: > ffmpeg -f concat -i list.txt -c copy output.mp4 You should probably be showing us list.txt. Actually, you should be showing us the complete, uncut console output of your ffmpeg commands as

[FFmpeg-user] issue with concat and seek

2016-10-19 Thread Carles Vila
Hi, I have two mp4 (myIntro.mp4 and movie.mp4) that I want to concatenate, but the second video should start at 10 seconds. Both mp4 have same properties. Normal concat without seeking works just fine: ffmpeg -f concat -i list.txt -c copy output.mp4 I cut the first few seconds of the movie to re