On Jul 7, 2016 13:08, "Christian Ebert" <[email protected]> wrote: > > * Louis Letourneau on Thursday, July 07, 2016 at 12:38:26 -0400 > > When cutting a video, even when transcoding, I often have a small delay > > between the video and audio. > > > > When looking at the video with either vlc or ffplay, I see the first frame > > shown twice.(The first is probably a dup until it the real pts is hit). > > > > I was wondering if there is a way to force cutting on video frame > > boundaries to avoid this. > > > > Also when using -ss to cut exactly to the video frame closest to where I > > want to cut. I still often get audio packets and frames with negative pts. > > You may be interested in this: > https://trac.ffmpeg.org/ticket/3859 > > Basically there's always some aac padding. I usually resort to > the atrim filter to butcher that off at the beginning, and > sometimes other nasty stuff. > > > If It then convert this video from mp4 -> hls, the negative frames are now > > positive and my video frame is push forward again. > > Yeah, the behavior of the hls or other segment muxers doesn't > make things easier.
This is great I didn't find that issue and I did look. It's exactly my problem. I'll fiddle with atrim and see where it leads me. Thank you very much Louis _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
