[FFmpeg-user] ffplay output

Mohammed Bey Ahmed Khernache mohbeyinfo at gmail.com
Wed Jul 4 14:48:49 EEST 2018


Thank you. That's what I really wanted.

‚Äč
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Mohammed BEY AHMED KHERNACHE
PhD student
Lab-STICC / CNRS UMR 6285
University of Southern Brittany, Lorient, France
Tel: +33-783-700-185
Email: mohammed.bey-ahmed-khernache at univ-ubs.fr
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On Wed, Jul 4, 2018 at 1:42 PM Moritz Barsnick <barsnick at gmx.net> wrote:

> Hi Mohammed,
>
> On Wed, Jul 04, 2018 at 11:00:55 +0200, Mohammed Bey Ahmed Khernache wrote:
> > could someone explain to me the *ffplay* outputs?
> > Given a video of 3288 frames. Decoding it with ffplay gives the output
> > below:
> > fd=742
> > aq=0KB
> > vq=0KB
> > sq=0B
> > f=0/0
>
> Which can actually be something like this:
>    3.23 A-V: -0.018 fd=   0 aq=   11KB vq=   17KB sq=    0B f=0/0
>
> The ffplay docs say:
>     Print several playback statistics, in particular show the stream
>     duration, the codec parameters, the current position in the stream
>     and the audio/video synchronisation drift.
>
> Looking at the source code, it is:
> - the playback duration so far ("3.23")
> - the timestamp drift between audio and video (if it says "A-V" -
>   otherwise the drift between audio or video and master clock)
>   ("A-V: -0.018")
> - number of frames dropped ("fd=   0")
> - the audio, video and subtitle queue sizes ("aq=   11KB", ...)
> - the number of incorrect DTS/PTS values so far ("f=0/0")
>
> Hope this helps,
> Moritz
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