[FFmpeg-user] FFMPEG RTSP stream problem

Balogh László laci at blacc.hu
Fri Apr 8 09:10:55 EEST 2022

Hi Adam,

Thanks a lot, problem is solved!!!

Yes its an ONVIF camera. I know that it can produce single JPEG 
pictures, but as i saw in the camera settings, its on sub channel which 
settings offers only 640*480 MJPEG picture, so i passed this. But now i 
did a try, and i'm now surprised, because wth the following command i 
got a full resolution (2688*1520) JPEG image very quick:

wget -O /<SAVETOPATH>/$today.jpeg 

So i think with this my problem is solved, and many thanks again for 
your tip!!

Regards, Laszlo

2022. 04. 08. 5:45 keltezéssel, Adam Nielsen via ffmpeg-user írta:
>> I have an RTSP stream which framerate is 1/16, which means every 16 sec
>> a frame is transported through RTSP. This framerate is because of a
>> special purpose, cannot and want not to change it.
>> What i want is to save every frame of this video as single JPEG image on
>> my server (Linux). Here the full command, which is working in bash script:
> This looks like an ONVIF camera.  Most of these offer screenshots in
> JPEG format, so you can use curl or wget to download a single frame as
> a .jpg when you need it.
> Is there a reason why you don't want to use the screenshot URL?
>> its waiting about 2 minutes. But don't know why?
>>     libswscale      4.  8.100 /  4.  8.100
>>     libswresample   2.  9.100 /  2.  9.100
>>     libpostproc    54.  7.100 / 54.  7.100
>> And after that its finishing with the following lines:
>> Input #0, rtsp, from
> It looks like it might be trying to probe the input to figure out what
> format it's in, since you can stream multiple codecs over RTSP.
> You could try messing with the -probesize option, but I'd only do this
> if there's some reason why the screenshot URL is unusable.
> Cheers,
> Adam.
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