On 1 March 2013 16:35, Julian Herrera <[email protected]> wrote:
> On 01/03/2013 15:13, Steve Hart wrote: > >> Hi >> We are investigating the possibility of using ffmpeg to record and >> playback video >> Could anyone tell me if it is possible to play back and seek within a >> file that is recording >> at the same time. >> So >> If we have a program that starts capturing video from an external >> source, encodes and records to disk >> and at the same time, play the video to screen and (most importantly) >> seek within it. >> (jog/shuttle/ffw etc). >> >> Is this possible? >> Any caveats? >> >> > I did something similar a few days ago. I used the Live555 library to dump > an mpegts stream into a local temp file from an RTSP server. Then I used > libav to play that file at the same time on different threads and > everything worked fine. I guess you just have to be sure of not crossing > the boundaries of the temporary file. > > Julian Herrera > > > > > ______________________________**_________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/**listinfo/libav-user<http://ffmpeg.org/mailman/listinfo/libav-user> > The issue here is seeking I think. I can open the currently recording file and play it back fine - but as soon as I seek, I get errors/hangs. I ensure that any seek forward is clamped at 2 secs before the current record. I should mention this is dv50 into mxf wrap. Steve
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