Douglas Spotted eagle
Forum Replies Created
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If you were to look at youtube’s vassttraining channel, you’ll find several CX7 vids, but we don’t use wmv to encode for youtube. It’s a myth that WMV is best for youtube; we tested this extensively when working on our “Video for the Web” training DVD.
Again, you’re not comparing apples to apples, and bringing youtube into the mix only serves to confuse the discussion that much more.
On Vimeo, I have some 1280 x 720 streams that combine SD with HD. The HD is mostly AVC, and it’s pretty apparent (to me) when the timeline switches from SD to HD and back.
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
Another way to phrase the question might be “which is better, paper bags or corn on the cob.”
You’re probably laughing, because this seems to be far out of context. It’s not.
AVI/Audio Video Interleaved, is a container. It can hold many different codecs including MPEG. AVCHD on the other hand, is a format, and can only be AVCHD, but could be packaged inside an AVI wrapper/container if someone wanted to go down that dev road. Seminar off…;-)
I assume by referring to “avi” what you really mean is “DV.” I would never consider taking a fairly highly compromised format such as AVC and converting it to DV for output to DVD. You’re crossing so many lines that shouldn’t/needn’t be crossed, but the big one is converting colorspaces three times when you don’t need to. The beauty of AVC is that it shares the same colorspace with DVD, so _no_ conversion is needed.
I’d respectfully submit the reason you’re seeing the differences in quality is a lack of understanding how the process works. Owning several CX7’s, an S3, and several other MJPEG-capable still cams, the still cam can’t really compete overall. But…if you’re converting to DV and using that as your comparison, then obviously you’re going to see some significant loss.
Compare the native AVCHD rendered to high bitrate WMV with the MJPEG-originated conversions to WMV, and you’ll find that the MJPEG is slower to render, and is of a lower quality.
You’re comparing 1440/1080 masters to 640/480 masters, and at 1MB, not sure if you’re uploading very high quality SD or fairly low quality HD, but in either event, the AVCHD master should generate a better overall image in this particular application.Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
Another way to phrase the question might be “which is better, paper bags or corn on the cob.”
You’re probably laughing, because this seems to be far out of context. It’s not.
AVI/Audio Video Interleaved, is a container. It can hold many different codecs including MPEG. AVCHD on the other hand, is a format, and can only be AVCHD, but could be packaged inside an AVI wrapper/container if someone wanted to go down that dev road. Seminar off…;-)
I assume by referring to “avi” what you really mean is “DV.” I would never consider taking a fairly highly compromised format such as AVC and converting it to DV for output to DVD. You’re crossing so many lines that shouldn’t/needn’t be crossed, but the big one is converting colorspaces three times when you don’t need to. The beauty of AVC is that it shares the same colorspace with DVD, so _no_ conversion is needed.
I’d respectfully submit the reason you’re seeing the differences in quality is a lack of understanding how the process works. Owning several CX7’s, an S3, and several other MJPEG-capable still cams, the still cam can’t really compete overall. But…if you’re converting to DV and using that as your comparison, then obviously you’re going to see some significant loss.
Compare the native AVCHD rendered to high bitrate WMV with the MJPEG-originated conversions to WMV, and you’ll find that the MJPEG is slower to render, and is of a lower quality.
You’re comparing 1440/1080 masters to 640/480 masters, and at 1MB, not sure if you’re uploading very high quality SD or fairly low quality HD, but in either event, the AVCHD master should generate a better overall image in this particular application.Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
If it was a subscription service, there is no way to play subscribe-serviced songs legally without the subscription.
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
Export as .mxf (XDCAM HD) and it’ll cross read perfectly.
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
if you’re seeing the render darker than it should be in Vegas preview, the problem is in your project settings (32bit, perhaps?) If it appears correctly in Vegas but not QT or WMP, the problem is in the gamma set up of your computer and/or player.
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
Where are you viewing the content? Only in Vegas? or in Windows Media Player or other external player? Gamma varies from player to player, which is in all likelihood causing the perceived shift in chroma value.
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
Normalizing is/should almost always be, a last ditch process.
If you can isolate the sounds in a deeper sound editor such as Forge, you’ll have a much better end result. You can also set the compression to trigger above the threshold of speech, but this will still not eliminate, nor have too effective a control over a percussive attack.
If you have Forge, Audition, or similar, you’ll do better to surgically approach this issue.Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
If you want it to play with 5.1 sound on a DVD for set top, it must be rendered to MPEG 2 with 5.1 AC3 sound. No choices. Unless of course, you want PCM audio, which some players cannot manage.
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
A compressor will work, most likely. But, “sharp sound” doesn’t really define anything. If it’s constant, then an EQ is in order vs a compressor, most likely. Or, an EQ-chained compressor that only hits that band.
A better description of “sharp sound” might help. Is it a percussive sound like a piece of steel hitting another piece of steel, or is it a badly eq’d sound that is like an icepick through the forehead? Both are “sharp” but would be treated differently.Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor