[vlc-devel] Detect for A/V Sample Delayed

Rémi Denis-Courmont remi at remlab.net
Tue Dec 12 15:54:55 CET 2017

Le 12 décembre 2017 16:51:29 GMT+02:00, "Lad, Prabhakar" <prabhakar.csengg at gmail.com> a écrit :
>Hi Remi,
>Thanks for the quick reply.
>On Tue, Dec 12, 2017 at 2:28 PM, Rémi Denis-Courmont <remi at remlab.net>
>> Hello,
>> It depends what you actually mean by delay and how you measure it.
>Something like the below log, when I enable the vlc messages:
>core warning: picture is too late to be displayed (missing 1455 ms)
>avcodec debug: enabling direct rendering
>avcodec warning: plane 0 not aligned
>avcodec warning: disabling direct rendering
>core warning: picture is too late to be displayed (missing 1446 ms)
>core warning: picture is too late to be displayed (missing 1434 ms)
>core warning: playback too early (-62177): down-sampling
>avcodec debug: enabling direct rendering.
>And also similarly for the audio:
>playback way too early (-122000): playing silence
>I want to detect them from the vlc application, without looking at the
>video so to save some time.
>Is there any api that I could use to parse them mp4 and detect for such
>flaws ?
>--Prabhakar Lad
>vlc-devel mailing list
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Those messages are computed from render and decoder. They intrinsically require decoding and rendering.
Remi Denis-Courmont

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