How to speed up / Slow down of video - when converting

[DragOnT]

Hi,

I would like to know if there are free tools (with GUI) which allow me, when converting, to speed up or slow down the video. Well, audio/video sync is required too.

Any help would be greatly appreciated.

Many thanks.

DragOnT

[redwudz]

You can duplicate frames to slow down video or subtract frames to speed it up, but you will loose audio sync. You may not like the video results, though.

Are you looking for a special effect or just trying to correct a problem?

Virtual Dub or AVIDemux should be able to do that for some formats of video. What format is the video?

Lots of ways to do all this, depends on the desired results.

And welcome to our forums.

[DragOnT]

Thanks Red,

I have bunch TV episodes in rmvb and avi formats which (I found) are dragging - in a sense that they are not quite the normal speed when we talk.

I am trying to speed up them up by say 20% so that they "sound" more "normal"

I used to have 2 DVD players (Sony and LG) which can speed up by up to 40% - but I have switched to non DVD player (I mean avi, mpg, rmvb stream player) so I would like to convert them before I copy them to my player's hard drive.

My last resort would be using GOM Player on my laptop and hook it up to my TV; but rather avoid this if I could.

Thanks again.

[redwudz]

You might want to check the framerate with MediaInfo. I use VirtualDub most of the time and just re-encode at a new framerate. If it's slow and you speed it up, the audio frequencies may be too high. But Audacity can fix that.

RMVB is problematic at times as not all programs do a good job of framerate conversions and you sometimes end up with sync problems. I usually just convert RMVB with Any Video Converter Pro. But that version isn't freeware.

You might have luck with AVIDemux, depending how it handles RMVB.

It sounds like the original creator of those videos already messed them up, so it may take a bit of work to fix them.

[DragOnT]

Thanks again Red,

I will look into those tools again since I did not see any of those options of "speed".

As far as the episodes go; they are fine as they are - nothing wrong with the rips. They tend to speak slower (more relax speed) than normal so that they put a 35 minutes show into 40 to 45 minutes program. Adding commercials make them an hour each. This is how they make money.

As said, GOM Player does a fantastic job speeding up with a more than decent audio up to about 200% - but I usually do not go over 40%.

Some where some time ago I googled that mencoder has a "speed" switch; but it is command mode - which I try to stay away from, so I did not read much and could not find it again.

[DragOnT]

Hoping for more inputs / comments
Thanks

[DragOnT]

up

[DragOnT]

Hoping for more inputs / comments
Thanks

[DragOnT]

up

[manono]

Post a sample of one that you say has been slowed. One of the AVIs will be fine, 20-25 MB should give us a minute or so of the show(?). And you never did as redwudz asked and give us what MediaInfo has to say about it.

[DragOnT]

Thanks manono. By the way, you need to speak the language/dialet and understand the culture in order for you to know if they are speaking tad slower - if I provide you with any sample.

As far as the episodes go; they are fine as they are - nothing wrong with the rips. They tend to speak slower (more relax speed) than normal so that they put a 35 minutes show into 40 to 45 minutes program. Adding commercials make them an hour each. This is how they make money.

As said, GOM Player does a fantastic job speeding up with a more than decent audio up to about 200% - but I usually do not go over 40%.

Consider there is nothing wrong with the media files; I just want to speed it up (just like GOM Player does; or those hardware I mentioned) but allows me to save it - if there is such a tool - and if you know it.

I was hoping someone like Lordsmurf, Baldric, ChrissyBoy, Edtv, etc to pitch in for their extensive experience and knowledge in this area.

Thanks

[manono]

Well, I've probably done as much speeding up (actually, slowing down) of audio and video as any video enthusiast on the planet, but thanks for the vote of confidence. Thanks also for the sample and for the MediaInfo information. I thought you wanted help.

I don't work with RMVB crap. If there's a way to speed it up, I don't know of any way other than a reencode frameserving using an AviSynth script file. AVI video (XviD and/or DivX) can be speeded up in VDub(Mod) without a reencode. As for the audio of both, convert to WAV and speed it up in Audacity before reencoding it back to whatever audio format you want.

[DragOnT]

Well, I've probably done as much speeding up (actually, slowing down) of audio and video as any video enthusiast on the planet, but thanks for the vote of confidence. Thanks also for the sample and for the MediaInfo information. I thought you wanted help.

I don't work with RMVB crap. If there's a way to speed it up, I don't know of any way other than a reencode frameserving using an AviSynth script file. AVI video (XviD and/or DivX) can be speeded up in VDub(Mod) without a reencode. As for the audio of both, convert to WAV and speed it up in Audacity before reencoding it back to whatever audio format you want.

My most sincere apology if you felt offended. I would like to let every one know that that was not my intent. That said, I better keep my mouth shut before we made matter worse.

By the way, the media files are not limited to rmvb. Many of them are in avi formats (or I could convert them first to avi). And my only goal is find a free tool that is able to speed up (or slow down) a video file with proper audio sync.

VirtualDub decimation just seems to remove frames, but leaves the total running time the same. Doing so, the video may look awful as Red had mentioned.

With a payware - Premiere Pro (v 5) - you just edit your video, then make a second "sequence", import your first sequernce into it, right-click it-=> speed; then select 150% for example.

Thanks all and I guess the mods can close this thread if they see this.

[manono]

Who said anything about decimation? You change the framerate in VDub(Mod which also speeds it up (or slows it down). The audio should be handled separately. And, of course, Premiere will also need to reencode it where, as I said, you can keep the original video quality of an AVI by doing it in (the freeware) VDub(Mod).

But if you've solved your problem to your satisfaction, then that's all that counts, eh?

[Megahurts]

VirtualDubMod will also strech or shrink the audio and change the pitch with the filters in the 'full audio processing mode'.

[DragOnT]

Thanks and thanks to all others above. I did figure it out in vdub. But the audio stretch is "hit and miss". Some parts would sync nicely while some parts are either chasing or trailing. That is also true using Audacity.

My solution now is watch the clips on my laptop and hooking it to my TV (HDMI) if I want big screen - using GOM to speed up.

In order to save (if I choose to or the next step) then use some kind of realtime capture - any suggestions?

Thanks again.