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Broadcast vs YouTube render file size
Hi guys
I am rendering a 5 min music video, which has got 3 way color correction on every clip as well as magic bullet Cosmo on many.
I am curious as to the output file size meant for Broadcast vs that meant for YouTube (or DVD etc) , my footage was captured in 50mbps 24p and is in a mov container.
The export settings for broadcast would be :
H.264
1920×1080
23.976
Level 4.2
Render at maximum bit depth
VBR 2 pass
Target bit rate 50mbps
Maximum bit rate 50mbpsThe output file size is 1189 mb.
And export settings for YouTube :
H.264
1920×1080
23.976
Level 4.2
Maximum bit depth
Target bitrate 10mbps
Maximum bitrate 10mbpsThe output file size is 376mb.
My questions are:
Are these acceptable sizes? The broadcast file seems awfully large for a 5 minute clip, what would the preferred industry standard method of delivery be, and does the broadcast company compress the file?
What if it is converted to tape, does file size matter and is quality affected in the transfer?
376mb for a YouTube music video seems large too. I could scale back the bit rate, but it seems like I shouldn’t have to?
I feel like I am missing something here in my process, and advice please?
Thanks,
Leon
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8 Replies
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Seems fine to me.
For broadcast you should have been given a spec sheet. Constant bitrate is preferred by some so that put up a yellow flag for me.
For YouTube, that size is also acceptable. It may be overkill as well but stuff will always be recompressed so I would just worry about producing the highest quality you can without going over their limits and whatever is sane for you to upload. Max video size is 15 minutes or 2GB. A verified account (by mobile phone) is increased to 20GB and unlimited time.
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Angelo LorenzoNeed to encode ProRes on your Windows PC?
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Thanks Angelo,
A 2 hour feature would be enormous then roughly 25gb! And then compressed to a third to fit onto a 8gb blu ray? That is only 1080p, I’d love to know what a 4k Arri or Red feature size would be. 100gb? More?
The spec sheet for this particular tv station wants it on old school beta tape. I was just curious as to the data size in case of future stations.
Thanks,
Leon
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From my experience full length programs are delivered on HDCam SR for HD delivery. I haven’t worked with anyone who delivers to a cable or broadcast network file-based.
Commercials are a bit all over the place. Averaging all of them, I usually see requests around 30mbps to 50mbps since many broadcasters or cable networks that interject local commercials will take file based media.
HDCAM SR tapes allow programs up to 2 hours. I’ve never worked at a station but I assume you can do tape switching during commercial breaks so a deliver may be split.
As far as 2K and 4K films, these are delivered to cinemas as DCP files on hard drives. JPEG2000 based compression, very large files.
——————–
Angelo LorenzoNeed to encode ProRes on your Windows PC?
Introducing ProRes Helper, an awesome little app that makes it possible
Fallen Empire Digital Production Services – Los Angeles
RED transcoding, on-set DIT, and RED Epic rental services
Fallen Empire – The Blog
A blog dedicated to filmmaking, the RED workflow, and DIT tips and tricks
Can your post production question fit in a tweet? Follow me on Twitter -
Greg stuff to know, especially about the commercials. Thanks Angelo
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Interesting that you think that 25GB video file is “enormous.” It isn’t…it’s typical. 100GB for a feature? That’s LOW!
When I deliver ProRes and DNxHD quicktime masters for broadcast (H.264 delivery is rare, and really I have only seen that for news)…I deliver hour long (well, 45 min) files that are about 75GB…two of them…texted and textless. This feature doc I am working on is 152GB for a 100 min project…exported out as ProRes HQ. We deliver on small 250GB USB3 hard drives. Yes…250GB is small. We are dealing with video here…file sizes are a lot larger than audio and pictures and documents.
Shane
Little Frog Post
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Hi Shane
Enormous relative to a DVD and as well in terms of the render! My 5min clip took 3 hours, how long does one of your full length features take you to render out?
It’s also boggling to me that the broadcaster is capable of sending such high volume of data at a quick enough speed to stream it.
What kind of hardware do you use for exporting?
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[Leon Kowalski] “My 5min clip took 3 hours, how long does one of your full length features take you to render out?”
A 90 min feature will take about 4 hours. But I avoid that when possible, playing out to a DVD Recorder. Unless I am making the final DVD for the client. Then a high quality DVD takes…yup, about 4 hours. But I do activate QMASTER on my tower. Without it, it might take 6 hours.
[Leon Kowalski] “What kind of hardware do you use for exporting?”
None. I use Compressor, or Adobe Media Encoder. Oh, but for making the DVDs on the DVD recorder…I have an AJA Kona 3 on my computer, downconverting the HD signal to SD sending that to my DVD recorder.
Shane
Little Frog Post
Read my blog, Little Frog in High Def -
Sounds good. I will have to beef up my specs or stop using magic bullet so much! Working on getting much better footage in the field so as to avoid all the post fixes.
Good to know the times though, thanks Shane.
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