On Wed, 7 Jul 2021 13:54:11 +0100, Rob Hallam <ffm...@roberthallam.com> wrote:
>On Wed, 7 Jul 2021 at 13:43, Bo Berglund <bo.bergl...@gmail.com> wrote: >> On Wed, 07 Jul 2021 14:21:15 +0200, Bo Berglund <bo.bergl...@gmail.com> >> wrote: >> >So is there a way to check if a video is static and generate an error in >> >that case? >> >Something like: >> >ffmpeg -i input_url -checkstaticvideo <maxstatictime> >> > >> >Is this possible? > >If you cannot get freezedetect to work, a workaround could be to >extract two images from a video stream separated in time, and use >imagemagick's 'compare' to get a numerical difference between them. >The documentation on that should be sufficient for you to wrangle up a >script to your liking. > >https://imagemagick.org/script/compare.php >https://legacy.imagemagick.org/Usage/compare/ > >In the meantime, there is an example on this SuperUser answer from 2019: > >https://superuser.com/a/1429300/461558 > >Cheers, >Rob Like the examples I have seen before all examples suppose that you have the video available as a file, whereas I am checking a *live stream* on YouTube which freezes from time to time and just shows a still (often just a blue triangle on black background). I have an automatic download scheme running on Linux to get the 1-hour segment videos from the stream so I can view them later, but I want to have a check for the times the stream stops so I can do something about it (like switching stream). So my "takedown detect" script checks if the stream is being blocked by Youtube and this works using youtube-dl with the -F switch. Works OK, I get an email if it is blocked. But now I saw a different error I also want to check for, this is when the stream semingly works fine but the video has frozen. Then my earlier detection does not catch it so I have to add a new detect to see the frozen video case too.... So ffmpeg must accept the -i argument as an on-line stream somehow... Unless there is some other way to detect that a stream sends a still image. -- Bo Berglund Developer in Sweden _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".