On Wed, Jul 05, 2017 at 10:41:49 +0200, Evert Vorster wrote: > Hi there, developers on this list.
This is more of a question for ffmpeg-user, actually. > 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. > 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). > 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. Cheers, Moritz _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
