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You Tube…Please View Video
Hi, I’m including a link to view my first You Tube video for a client shot in HDV. If you click on the HD, you can see the HD version. For some reason both versions seem jerky, like they are not playing back at 29.97 fps. I’m OK with image quality, but not the playback. Here are my settings in Sorenson 5:
2 Pass VBR
1920×1080
Frame Rate 1:1
Key Frame every 300 frames and auto key frame on scene change is set in the middle at 50Also, I usually deinterlace in Premiere Pro, this time I didn’t…I let S5 do it.
https://www.youtube.com/watch?v=djBKvO5VXdM
sorry, I tried to embed a link, but it didn’t show up.Thanks for any comments or suggestions to make the video more smooth.
Jeffrey S. Gould
Action Media Productions -
21 Replies
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Looks like lots of dropped frames.
Try downloading it to see how they encoded it. It may well be a YouTube playback issue rather than a bad encode.
I’d upload 720p, not 1080. I would not trust YouTube’s scaling. -
Thanks Craig, how do you download from you tube?
This was shot in Sony HDV 60I. I can try to make the size 1280 x 720 if you think that will help. Are my keyframe settings OK? Right now the HD version is only playing back digital garbage, no image at all.
Jeffrey S. Gould
Action Media Productions -
[Jeffrey Gould] “I can try to make the size 1280 x 720 if you think that will help.”
I don’t think the scaling is the cause of the dropped frames though. I don’t trust “bulk encode” parameters as used by online sites such as YouTube though.That’s why I recommend downloading their encode (there are many ways to do this) and seeing how it plays back. If that plays back clean it is likely a server side issue on their end.
I don’t think your key frames settings are at issue either. They’re reasonable.
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I just read on another site that you should use 1280*720 as well due to scaling issues. Right now it says “trying to reach server” so maybe they are having issues. Would a deinterlace issue cause dropped frames? I just watched the mp4 that S5 generated and it exhibits the same jerkiness, so you tube is not the problem. I think it might even be my source file from PPRO. I’ll experiment. Thank you Craig.
Jeffrey S. Gould
Action Media Productions -
I downloaded the YouTube encode and had a look at it. The data rate was higher than I expected, over 3000kbps, but that shouldn’t, in and of itself, be the problem if one has very fast speeds as I do.
Jogging through frame by frame I see that it looks as if there’s some strange frame order flipping. On moving shots (pans, zooms, tracking, dolly shots etc) it’s as if an earlier frame is periodically being accessed.Make sure you’re using Squeeze 5.1 as MainConcept and Sorenson fixed some serious issues with their H.264 encoder.
Make sure the jerkiness you’re seeing on your S5 encode isn’t just a playback issue on your side. Playing back a high data rate H.264 at 1080p can tax some computers.
Do a 720p encode at about 5000kbps and see how that plays back. And again, update to S5.1 ASAP and do the encode with that.
Given how long it took me to download the encode (much longer than it should have IMHO) Youtube may also be having server side issues . . . but do the above and make sure there’s no issue with your encode first.
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You’re such a good guy to help me and others out like this. I’m using the latest update to S5. I just exported a small section from Premiere PRo,I should add that I use a Matrox RTX2 card as well. This time, I chose No Fields, so I’m hoping that was the issue. Agreed, the computer could’ve had a hard time keeping up, which is why I saw stuttering. I’m encoding the small section in S5 now at 1280×720, 10 minutes to go. I’ll upload to you tube and let you know/see the results. What’s strange is that even though PPRO exports as 1440*1080, in S5, it opens up as 1920*1080. Thank you again, don’t know what I’d do without you.
Jeffrey S. Gould
Action Media Productions -
Craig, this new test seems even worse. I did this at 4000kbs, not 5000, but still…that’s more than the first test at 3000. I had deinterlace turned on from PPRO. I have to upload this tomorrow for client and not sure what else to try. I have a really fast connection, so that’s not it. Here is the link:
https://www.youtube.com/watch?v=OsXWz5TGUL4 thanks
Jeffrey S. Gould
Action Media Productions -
i just subscribed to your youtube.
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[Jeffrey Gould] “this new test seems even worse.”
In what way?
Do you see dropped frames on your system?
FIRST what does your SOURCE file look like on YOUR system? -
If I import the Matrox AVI I made back into PPRO, I do see some stuttering on the horizontal moving shots. the vertical moving shots and zooms on the digital pics seem to be OK. I wonder if the Matrox AVI is the problem and I should export an umcompressed AVI to S5. As an aside, it seems that you tube is having a hard time playing back the HD version.
I’m exporting an uncompressed AVI now and will post youtube link when ready. The uncompressed AVI is 4gb for 35 seconds, compared to the matrox one which was 483mb for 45 seconds.
Jeffrey S. Gould
Action Media Productions
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