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Rendering long clips that VLC can’t play-Vegas 8
Hi,
I’ve attempted twice to render a 90 minute clip of footage shot in 4:3 at 60i, 720×480 resolution on Vegas 8. I rendered the footage in mp4, 720×480 resolution, progressive scan, .9091 pixel aspect ratio, a constant bit rate of 4,000,000, and at 29.97 frames per second. When I try to view it with VLC, I get an error message that says,
“VLC can’t recognize the input’s format:
The format of ‘G:\My Films\Xmas Showcase\Xmas Showcase Camera 1.mp4’ cannot be detected. Have a look at the log for details.”I test rendered smaller clips multiple times on different settings and in different formats and got it to play fine. Well, not when I messed with the settings too much, but it still played.
If it helps anyone understand what I’m doing, I have three video tracks total with corresponding audio tracks laid out on top of one another. They’re from footage of a comedy show that was shot on three cameras. Because we all changed our tapes at different times and started different times, the guy in charge of it all wanted me to digitize the footage and synchronize it for him to edit on his own. Since I can’t just give him the benefit of me synchronizing them in the timeline, I figured I’d render them all synchronized with empty sections where the camera operator stopped recording.
I’m kind of thinking to just render each video and audio track to a new track so he can use that and wonder if I won’t have the same issue viewing it.
Then again, I wonder if there isn’t a problem with the rendered video itself, but just that my copy of VLC doesn’t have what it needs to play it properly.
Thanks in advance guys.
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8 Replies
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Ok, that’s the background, what’s the question?
Grazie
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“I test rendered smaller clips multiple times on different settings and in different formats”
Have you tried only changing one variable at a time? How about just a few minutes of the problem video with all the same settings?
“Since I can’t just give him the benefit of me synchronizing them in the timeline, I figured I’d render them all synchronized with empty sections where the camera operator stopped recording.”
Huh? Get PluralEyes – it works magic to sync multi-cameras tracks.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
(I’ve attempted twice to render a 90 minute clip of footage shot in 4:3 at 60i, 720×480 resolution on Vegas 8. I rendered the footage in mp4, 720×480 resolution, progressive scan, .9091 pixel aspect ratio, a constant bit rate of 4,000,000, and at 29.97 frames per second)
Is the original footage DV? Why don’t you render as DV? MP4 is way harder for a CPU to edit than DV. I gather the other person isn’t using Vegas to edit with. If he is, you can sync each track very easy using the audio waveform, save the .VEG file, give him the files and the .VEG file and he can open it in Vegas in sync like you made it.
It’s always a good idea to render to the same format as the source files if it’s going to be edited again. If there are no effects added or fades, vegas won’t recompress the video. The quality takes a hit everytime it gets recompressed. -
[Danny Hays] “It’s always a good idea to render to the same format as the source files if it’s going to be edited again. If there are no effects added or fades, vegas won’t recompress the video. The quality takes a hit everytime it gets recompressed.”
This is exactly what I was going to say. Do not use MP4 to give to someone to edit; give him DV AVI files.
Your idea is a good one. Line up all the tracks in Vegas, then solo each camera track and render just that track. This should make it very easy for him to edit later.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Interesting. Thanks guys. Yes, they’re in DV, so I’ll try it in AVI and see how that works.
But this gives me another question. I can’t view AVI videos on my computer-not sure what program or plugin I need-so while I can render that, I wouldn’t be able to view the footage to make sure it came out all right. Does anyone know what I need to view rendered AVI videos?
Thanks again.
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[Angelo Mike] “I can’t view AVI videos on my computer-not sure what program or plugin I need-so while I can render that, I wouldn’t be able to view the footage to make sure it came out all right.”
Open the AVI file in GSpot and see what codec it needs (GSpot is a free utility you can download). It will tell you if the codec is installed and working properly or not. Windows can play DV AVI files right out-of-the-box so if you can’t play DV AVI files on your computer, you have messed it up somehow.
Did you install any Codec-Paks (like K-Lite)?
~jr
http://www.johnrofrano.com
http://www.vasst.com -
No, at least I don’t think I have.
But I guess it resolved itself-I was able to view the videos on Divx last night. They did slightly stutter-very slightly-every few seconds, and when I rendered a 25 second clip to compare it, it didn’t stutter.
So for the moment I’m just hoping that it’s an issue with my computer (which is fairly beat up at this point, I’m replacing it next week, along with upgrading to Vegas 9).
Thanks again.
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Edit: This is so far down the page, I’ll just post a new thread since I have a new issue.
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