Video and Sound doesnt match (video output)

hipoonios · 23 July 2009, 16:13

Then recording video files sound doesn't match the video. This causes sound desynch. Very irritating.

You can try yourself recording a short video and open the file in virtualdub and you see this: (videomenu>framerate).

As you can see it shows 50.093. But sometimes it can goes much more like 50.850.

I've tried WinUae versions from 1.4 to 1.6 and many codecs with same result.

Ironclaw · 23 July 2009, 16:40

Mmm, for me it has always been like that, since the first version I used. Just correct the delay using any method you know instead to fix it. But yeah, I too rather want desync free recordings, but never thought it would be possible to make with WinUAE so I just keep using my methods to sync the sound (I know you too know more than one).

hipoonios · 23 July 2009, 16:48

I know a few ways to fix the problems afterwards. But it's not always it works.

It would be so much better if WinUae could record correct files right away.

Ironclaw · 23 July 2009, 16:56

Mmm, saves alot of trouble and effort.

Toni Wilen · 23 July 2009, 17:18

I have been asking for examples ages ago. Never seen good enough.

Example: "I tried to record <A500 game name> with A500 quickstart but sound is not sync when I watch the recording. I used <put codec name here> with settings like <this>. WinUAE resolution was <width>*<height> windowed, null filter." (do not answer 800x600 or something similar..)

Thats minimum information because I can't duplicate this.

Mad-Matt · 23 July 2009, 18:16

Ive recorded loads of stuff with winuae lately with no sync issues (nothing that stands out anyway). If fps is fluctuating then audio is matching the change.

Ironclaw · 23 July 2009, 18:21

Quote:

Originally Posted by Mad-Matt

Ive recorded loads of stuff with winuae lately with no sync issues (nothing that stands out anyway). If fps is fluctuating then audio is matching the change.

It's apparent when you combine/join/merge several avis, maybe not in short movies.. but we do hours long longplays

.... the sound/video is always in sync at start, then little by little it goes further and further apart.... could be a sound delay by 1 mins after 1 hour.....

Hope Hipooios or someone else will post the delails Toni needs. As I can't be arsed

.

hipoonios · 23 July 2009, 18:31

It doesn't matter with filter or settings or resolution you're recording in. (I've tried it all). It also seem to happen on all games.

By just watching the video you will probably not notice the desynch. Best thing to do is to open it in VirtualDub and see what it says there.

If match video/sound is about 50.124 or 49.489 you will not probably notice.

I'm linking here to a file with 50.506. It very rare it's so much like this.

Codec: TSCC/PCM Audio 800x600:

https://www.bredbandsbolaget.se/utde...ays/temporary/

about 44mb file. Check the end of the video. Last 2 seconds have no sound.

LocalH · 26 July 2009, 00:25

I remember having a problem like this but with an NES emulator, and it turned out that the exact emulation speed (which drove generation of audio as well) was not exactly 50/60fps, but the value being written into the AVI file was 50/60fps anyway. This caused the sync to skew. It's possible to fix with AviSynth, I'd have to dig up the old script I used to do so.

Anyone feel like digging through the WinUAE sources to find the necessary data to compute exact framerate, down to 1Hz accuracy?

23 July 2009, 16:13	#1
hipoonios Amiga Hardcore Gamer Join Date: Apr 2005 Location: Sweden Age: 46 Posts: 1,207	Video and Sound doesnt match (video output) Then recording video files sound doesn't match the video. This causes sound desynch. Very irritating. You can try yourself recording a short video and open the file in virtualdub and you see this: (videomenu>framerate). As you can see it shows 50.093. But sometimes it can goes much more like 50.850. I've tried WinUae versions from 1.4 to 1.6 and many codecs with same result.

26 July 2009, 00:25	#9
LocalH Amiga user since 1990 Join Date: Aug 2004 Location: Kingsport, TN / USA Age: 44 Posts: 295	I remember having a problem like this but with an NES emulator, and it turned out that the exact emulation speed (which drove generation of audio as well) was not exactly 50/60fps, but the value being written into the AVI file was 50/60fps anyway. This caused the sync to skew. It's possible to fix with AviSynth, I'd have to dig up the old script I used to do so. Anyone feel like digging through the WinUAE sources to find the necessary data to compute exact framerate, down to 1Hz accuracy? Last edited by LocalH; 27 July 2009 at 17:23.

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23 July 2009, 16:40	#2
Ironclaw Banned Join Date: Oct 2004 Location: ... Age: 45 Posts: 3,313	Mmm, for me it has always been like that, since the first version I used. Just correct the delay using any method you know instead to fix it. But yeah, I too rather want desync free recordings, but never thought it would be possible to make with WinUAE so I just keep using my methods to sync the sound (I know you too know more than one).

23 July 2009, 16:48	#3
hipoonios Amiga Hardcore Gamer Join Date: Apr 2005 Location: Sweden Age: 46 Posts: 1,207	I know a few ways to fix the problems afterwards. But it's not always it works. It would be so much better if WinUae could record correct files right away.

23 July 2009, 16:56	#4
Ironclaw Banned Join Date: Oct 2004 Location: ... Age: 45 Posts: 3,313	Mmm, saves alot of trouble and effort.

23 July 2009, 17:18	#5
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,502	I have been asking for examples ages ago. Never seen good enough. Example: "I tried to record <A500 game name> with A500 quickstart but sound is not sync when I watch the recording. I used <put codec name here> with settings like <this>. WinUAE resolution was <width>*<height> windowed, null filter." (do not answer 800x600 or something similar..) Thats minimum information because I can't duplicate this.

23 July 2009, 18:16	#6
Mad-Matt Longplayer Join Date: Jan 2005 Location: Lincoln / UK Age: 44 Posts: 1,846	Ive recorded loads of stuff with winuae lately with no sync issues (nothing that stands out anyway). If fps is fluctuating then audio is matching the change.

23 July 2009, 18:31	#8
hipoonios Amiga Hardcore Gamer Join Date: Apr 2005 Location: Sweden Age: 46 Posts: 1,207	It doesn't matter with filter or settings or resolution you're recording in. (I've tried it all). It also seem to happen on all games. By just watching the video you will probably not notice the desynch. Best thing to do is to open it in VirtualDub and see what it says there. If match video/sound is about 50.124 or 49.489 you will not probably notice. I'm linking here to a file with 50.506. It very rare it's so much like this. Codec: TSCC/PCM Audio 800x600: https://www.bredbandsbolaget.se/utde...ays/temporary/ about 44mb file. Check the end of the video. Last 2 seconds have no sound.

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