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Old 20th October 2020, 17:59   #3  |  Link
benwaggoner
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Join Date: Jan 2006
Location: Portland, OR
Posts: 4,750
Quote:
Originally Posted by jriker1 View Post
Not sure if this is the right area but mentioned VC-1 so thought I'd give it a try.

I have some VC-1 content that I want to open in Premiere Pro but obviously can't.
Are you on Mac? Premiere on Windows certainly could open WMV files last I checked. There was also Flip4Mac which added WMV and VC-1 support to Macs. But it appears Telestream has replaced that with their Switch conversion tool. I set up the original deal for Microsoft to distribute the free Flip4Mac during the Bush administration. I feel old .

Quote:
It's also in a M2TS container right now but know that could be changed but wouldn't help this specific situation.
If you are on Windows, LAV Filters should add support for VC-1 in the M2TS format. I'm not sure if there is a Mac equivalent for plug-in file support, but if so, that'd be the easiest way.

Quote:
I don't care of size, but what would be the best way to take either the VC1 file directly or the M2TS container with the VC1 video and convert it lossless to another temporary format for editing in Premiere Pro?
Ffmpeg can certainly do this for you, among many other options. IDR-only lossless H.264 or HEVC would work fine.

VC-1 has some optional postprocessing modes for deblocking and deringing that can help if the content is visibly compressed. If you're using the built-in Windows decoder, the old WMV PowerToy can set the appropriate registry keys (the download isn't working at the moment, but zambelli says it'll be fixed today). Other workflows may or may not provide that option.

(from a former Microsoft VC-1 evangelist)

VC-1 was a lovely codec for the then use case of good quality with performant decoding on single core x86 processors without SSE2 (still plenty of Pentium III CPUs out there when WMV9 was released in 2002). Biggest flaws were the lack of adaptive quantization support in I-frames in the original Main Profile (fixed in Advanced Profile) and a too-weak in-loop deblocking filter (a perf tradeoff assuming most playback would use the optional postprocessing filters, which didn't actually get implemented much of anywhere outside of Windows itself; it wasn't even in Silverlight).
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