[FFmpeg-user] Image2 demuxer on Synology

Carl Eugen Hoyos ceffmpeg at gmail.com
Sun Jan 6 14:20:43 EET 2019

2019-01-04 17:15 GMT+01:00, Stuart Bruce <stuartrbruce at gmail.com>:

> Thanks to your earlier messages I've made progress, but I've now hit
> another problem. I've got a new set of parameters being called:
> ffmpeg -i
> ../fromAnima/Shots/animation_194_20181204/E113_SEQ070_SH0070_anim_r002.mov
> -c:v png -vframes 1 -f rawvideo
> ../media/thumbnails/shots_internal/Screengrabs/E113_SEQ070_SH0070_anim_r002_0069.png
> 2>&1
> And on Wampserver that I'm testing with, that will generate a PNG file. (I
> can't seem to persuade it to do a JPEG but that's a different question for
> later.)
> However when I run the same command on the Synology, with the older FFmpeg
> version (that I want to avoid updating if at all possible), it is failing
> with the message:
> "Error while opening decoder for input stream #0:0 : Operation not
> permitted."

Does this happen for every input file or only for this one?
Does the following succeed?
$ ffmpeg -i input -f null -

Please understand that there is a reason why we require you
to test current FFmpeg git head...

Carl Eugen

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