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Rendered Vid doesnt work like source video does…
Ok, so here’s the situation:
I used Youtube Downloader to download the hi-res version of a short film I appeared in, because I wanted to edit it (add end credits scroll to it).
The source material from Youtube Downloader ended up being an 82mb mp4 file. I brought it into Vegas Pro 9.0, and set the project properties to match the source material properties (see all of this below). I did the editing I wanted, and rendered to the same type of file format with the same attributed as the source material. First – the resulting file is half the size of the source material – and I have added about 30 seconds of scroll / music / background pic to the file. I didnt want it to be smaller or compressed or compromised in any way. Secondly, when I play the rendered file either in Quicktime Player or Win Media Player, it will play fine, but if I try to move the progress bar in either direction – it will move – but the video will freeze for about a minute or more, until it finally starts playing, and sometimes it doesnt play in sync from that new point – the audio will play – but the video is frozen. It’s almost like when I move the play progress bar – it is having to search for the material or something…it’s stalled until a minute of so later, when it will start playing again.
More details:
Computer: Windows 7 64bit, brand new, Intel Core i7 CPU, Q720, (i believe this is a quad core) @1.60GHz, 4GB RAM.
Vegas Pro 9.0cAll info and settings are as follows. Please take a look and see if I have done something wrong:
SOURCE MATERIAL INFORMATION:
(by right clicking on video track and selecting properties):
– Use Timecode In File: SMPTE Drop (29.97 fps, Video)
– Stream: Video 1
– Format: AVC
– Attributes: 1280x720x32, 5:35
– Frame Rate: 29.97 (NTSC)
– Field Order: None (Progressive Scan)
– Pixel Aspect Ratio: 1.0000 (Square)
– Alpha Channel: None
– Rotation: 0 (Original)
– Streams
Audio: 00:05:35.853, 44,100 Hz, Stereo, AAC
Video: 00:05:35.902, 29.970 fps progressive, 1280x720x32, AVCPROJECT PROPERTIES SETTINGS
VIDEO TAB
– Template: HDV 720-30p (1280×720, 29.970 fps)
– Width: 1280
– Height: 720
– Field Order: None (Progressive Scan)
– Pixel Aspect Ratio: 1.0000 (Square)
– Output Rotation: 0 (original)
– Frame Rate: 29,970 (NTSC)
– Pixel Format: 32-Bit Floating Point (full range)
– Compositing Gamma: 1.000 (Linear)
– Full-resolution Rendering Quality: Best
– Motion Blur Type: Gaussian
– Deinterlace Method: Blend FieldsAUDIO TAB
– Master Bus Mode: Stereo
– Number of Stereo Busses: 0
– Sample Rate (Hz): 44,100
– Bit Depth: 16
– Resample and Stretch Quality: BestRENDER SETTINGS:
– Save as type: MainConcept AVC/AAC (*.mp4) – same as source
– Template: Custom Template as follows:
— Frame Size: Custom Frame Size…Width 1280 Height 720
— Profile: Main
— Frame Rate: 29.970
— Field Order: None (Progressive scan)
— Pixel Aspect Ratio: 1.0000
— Number of Reference frames: 2, Use Deblocking Filter checked
— Variable Bit Rate: Two Pass checked,
— Maximum bps (tried at 768,000 and 14,000,000)
— Average bps (tried at 768,000 and 10,000,000)
— The 768000 settings resulted in a 42MB file, the 10/14 million settings resulted in a 125MB file – both files experience the same problem in playback
— AUDIO Tab: Include Audio, Sample Rate 44,100, Bit Rate – tried 128000 and 192000 – this made no difference
— PROJECT TAB: Video rendering quality: BESTThats all the information I can think to give. Basically what I want to accomplish, is to take the source material, add a few title cards at the beginning and a credits scroll, and then render the file in the exact format it started in and then re-upload it to YOUTUBE again – without losing any quality, etc.
But for some reason – the output file was 42MB (compared to the source material 82mb). When I upped the variable bit rate settings to 10/14 million (max / average), it resulted in a 125MB file. But both files rendered experience this problem playing. I don’t know if I am missing something or what. But I am out of ideas.
Any help is GREATLY appreciated!
Thanks,
ChrisBest,
Chris Forsyth
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7 Replies
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Not possible to render from low bitrate MP4 to mp4 without suffering loss, unfortunately….
Douglas Spotted Eagle
VASSTCertified Sony Vegas Trainer
Aerial Camera/Instructor -
What have I done wrong.I am ready to render and notice that mytimeline has pink segments (both audio and video). Ok, i try to render and a message comes back asking if i have access to the file at the time the pink starts…any clues? (render stops) (yes i did see those pink araes while working but I though it was just track colour.)
Luke Wensing
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I would use Sony AVC instead of MainConcept AVC. It may solve your playback problem. As Spot said, you will still loose quality because you have to re-render to add anything to the video.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
John:
BINGO!!!
That did it!
Cant thank you enough.Funny thing is, just using the default settings for that render option resulted in a 287MB file, vs the 87MB file that I started with. Maybe the default bitrate of 6mbps makes it that big? Not sure what it is – but the playback works wonderfully! Thanks so much again John.
Best,
Chris Forsyth
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You’re welcome. The bit-rate is directly related to the file size. I usually use 3.5Mbps for most internet video and it looks fine.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Aah…good to know…I’ll render one out at that bitrate and see what that gives me in file size. I’ve never uploaded anything to YouTube, so I don’t know if there are any file size limitations. I’m guessing that the larger the file size, the longer the buffering time for the viewer?
Best,
Chris Forsyth
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I don’t know if there are any file size limitations.
Yes, YouTube has file size limitations. Videos can be up to 2 GB in size and up to 10 minutes in length.
I’m guessing that the larger the file size, the longer the buffering time for the viewer?
Yes, indirectly. It’s really the higher the bit-rate the longer the buffering time.
~jr
http://www.johnrofrano.com
http://www.vasst.com
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