Encoding Script Optimized For YouTube

[dellsam34]

Any suggestions of a ffmpeg script to encode a lossless HuffYUV UHD file into a codec suitable for uploading into YouTube, So basically I just want to reduce the file size to stay below the YT file size limit, I would like to keep the 4:2:2 chroma sub and audio as PCM if possible, I've always uploaded lossless HD to YT since bandwidth is not an issue for me but 4k/UHD exceeds YT file size limit for uploading. I know YT compresses everything and makes it much worse, this is the exact reason I keep the file as lossless as possible before uploading so it gets butchered only once. A sample file is attached.

[davexnet]

What is youtubes bitrate limit ? THe only thing I see is a maximum 256 GB per file

[dellsam34]

My problem is not the bitrate, the file size is the limit.

[jagabo]

Something like (in a drag/drop batch file):

ffmpeg -y -i %1 -pix_fmt yuv422p10le ^
    -c:v libx265 -preset slow -profile:v main422-10 -crf 15 -colorspace bt709 ^
    -c:a copy "%~n1.x265.main422-10.mkv"

That delivered a 5.5 MiB file (from your 245MiB source).

[davexnet]

My problem is not the bitrate, the file size is the limit.

Well it's related.
a 30 minute file @ 1000kbs and a 15 minute file at 2000kbps would be about the same size...
so then the run time AND bit rate become a factor.

Your file is marked interlaced but it's progressive.
Encoded it in vdub2 using ffv1 lossless compression @ 422 chroma, PCM audio and received a file at about 55MBs
I

[jagabo]

The AVI file isn't flagged interlaced. MediaInfo always assumes huffyuv in AVI is interlaced.

[davexnet]

The AVI file isn't flagged interlaced. MediaInfo always assumes huffyuv in AVI is interlaced.

Good point.

[dellsam34]

I will try both ffmpeg and vdub variants and see which one looks better after an upload.

[dellsam34]

Something like (in a drag/drop batch file):

ffmpeg -y -i %1 -pix_fmt yuv422p10le ^
    -c:v libx265 -preset slow -profile:v main422-10 -crf 15 -colorspace bt709 ^
    -c:a copy "%~n1.x265.main422-10.mkv"

That delivered a 5.5 MiB file (from your 245MiB source).

How would I use this for a single file and where to insert the file name?

[davexnet]

I think jagabo's approach is better. Will give you the option to upload much longer files and shorter upload times.
I don't think it's necessary to keep it lossless, although on my PC, a bit on the slow side, the lossless encoding is quicker

[jagabo]

Something like (in a drag/drop batch file):

ffmpeg -y -i %1 -pix_fmt yuv422p10le ^
    -c:v libx265 -preset slow -profile:v main422-10 -crf 15 -colorspace bt709 ^
    -c:a copy "%~n1.x265.main422-10.mkv"

That delivered a 5.5 MiB file (from your 245MiB source).

How would I use this for a single file and where to insert the file name?

It's a drag-and-drop batch file. Put the code in a bat file (a plain text file with the extension .bat rather than .txt), then drag/drop a video file onto the bat file. Or put the bat file in your Send To folder. Then you can right click on a video file and select Send To -> (name of bat file) from the context menu.

Of you can type:

ffmpeg -y -i "input.avi" -pix_fmt yuv422p10le -c:v libx265 -preset slow -profile:v main422-10 -crf 15 -colorspace bt709 -c:a copy "output.mkv"

[dellsam34]

For some reason that -y caracter at the beginning of the the second script did not process the file, so I removed it and it worked, Here is both lossless and encoded files uploaded to YouTube:

Lossless: https://youtu.be/mGse2ZN94GQ
Encoded: https://youtu.be/h9j1KNmxnzA