[FFmpeg-user] Max rtbufsize Via dshow

Carl Eugen Hoyos ceffmpeg at gmail.com
Fri Jan 11 02:55:38 EET 2019

2019-01-11 1:53 GMT+01:00, Gabriel Balaich <roderrooder at gmail.com>:
>> What happens at this point?
>> Do the messages stop or does the system continue to drop frames?
> That's the end of the recording about a second after I hit q to quit, so
> everything subsides as the process has ended.
> What happens in-between? Do the drops stop at some point?
> The sources are live, the first few frame drops occur before the recording
> starts, or at least before the summary line starts to show and then they
> stop until I decide to end the recording by pressing Q to quit (Ctrl+C
> heeds same results).
> Timeline:
> I paste my command in terminal and hit enter >
> Text flies across console, several frame drops can be spotted due to
> "rtbufsize" overfilling >
> console settles down revealing summary line (fps, time, speed etc.), speed
> is around .5x (frame dropping has subsided at his point) >
> About a minute in speed is around 1x >
> I hit [q] to end the recording >
> Frame drop warnings fly across the console due to "rtbufsize" overfilling >
> Recording has ended all feedback is silenced

Thank you for the explanation / confirmation!

Now the question is still if increasing the buffer size would
really help.

Carl Eugen

More information about the ffmpeg-user mailing list