[Bf-funboard] "Frame Dropping" and "AV-Sync" should be only one mode.

[Tiago Estill de Noronha]

I think Frame Dropping is meant for when the scene is too heavy to play in
real time at full frame-rate. Since your No Sync time was shorter, I guess
your scene is too light? I'm not sure what Frame Dropping is doing when
playback is faster than expected instead of slower.

If Frame Dropping is supposed to be clock-accurate, then I guess you did
find a bug; and the mode needs to be renamed as well.



I think the AV-Sync is supposed to be clock-accurate as measured by the
progress of the audio, so if the audio lags the animation should also lag,
but if the animation lags it skips frames to catch up with the audio,
making it so that the exact same frame is always played at the exact same
point in the audio. I'm not sure what would it take to make the audio lag
to be able to test it though.

On Fri, Nov 24, 2017 at 3:28 AM, Mario Sottile - Marionetas Mey <
mariomey at gmail.com> wrote:

> I made some tests with a blend file of mine and a chronometer. My computer
> is not so fast... so:
> **No-Sync**: Chronometer: 1min, Blender: 17sec.
> **Frame-Dropping**:  Chronometer: 1min, Blender: 46secs
> **AV-Sync**:  Chronometer: 1min, Blender: 1min.
>
> What's the point to have a **Frame Dropping** mode, while having
> **AV-Sync** that goes exactly the same as the real clock... and it also
> drops frames? It's confusing.
>
> I think that Blender should have only two modes, called: **No-Sync** and
> **Frame-Dropping**. And this last mode, obviously, should have audio and
> video synchronized.
>
> This is not actually a bug. Or maybe yes... and it is about "Frame
> Dropping" that does not play well... I don't know.
>
> Thanks.
>
>
> Some history.
> In 2.49:
> - The default playback was actual "No Sync"
> - "Sync Playback to Frames/Sec" option was actual "Frame Dropping".
> - "Synchronize with the VSE sound" (speaker button), played sounds from
> VSE. Now, Blender always plays sounds, even with "No-Sync". This option
> became in "AV-Sync", I think.
> - Also, there was "Sequencer Windows" option, that let play all VSE
> windows at the same time. This option is no more, now all windows/panels
> are synchronized.
>
>
> --
> Marionetas Mey
>
> Mario Sottile - Director
> (011) 15.6283.1576
> www.mariomey.com.ar
> info at mariomey.com.ar
>
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