I thank you for the very prompt reply.
This is more of a question for ffmpeg-user, actually. > My apologies! > > > Is it possible to pause decoding and encoding of a file with a script? > > You can suspend ffmpeg with a signal. But that won't be very precise in > terms of timing. > Ctrl+z? I'll have to educate myself on that. Does this work for encoding, too? > > > During the pause between the frames, we want to manipulate the extracted > > frame. This is done with other tools in a script. The manipulations is > with > > a hugin template, Panotool's nona and enblend, so it's a little outside > of > > what ffmpeg filters can do. (I think?) > > I guess there's no such filter (yet). > Now that would be awesome. I am sure we are doing things very inefficiently. All the frames are transformed in exactly the same way. > > The ultimate aim of this is to avoid eating many gigabytes of disk space > by > > completely expanding a input video into lossless frames. > > I suggest to extract the frames to stdout using the image2pipe format, > and pipe that output to a wrapper script which (somehow) detects a > completed frame and passes it on to your processing chain. If you block > the output pipe once a complete frame has been received, ffmpeg should > pause processing; once you continue to pull data from the pipe, ffmpeg > will continue to process. > > I just quickly checked by piping ffmpeg's image2pipe format to "less", > and it seems that ffmpeg only continued to process when I allowed > "less" to read more input. > > Try if that works for you. The wrapper may not be trivial though. > Thank you very much for this valuable information. I will have a play with it. Kind regards, Evert _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
