What is the proper way to format x264 settings?

Help/How To
1

I’m new to shotcut. I’ve been using virtualdub2 for a while and I encode in x264 placebo or very slow, sometimes with extra command lines for advanced users.

If I use placebo in virtual dub I know I’m getting this…

cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=tesa / subme=11 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=1 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=16 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

And very slow this…

cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=1 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

Does it work the same with shotcut?

How do I set something similar in shotcut? What is the proper syntax/format? And how do I know if the encoding setting went through right? Where can I see a log of it.

This is what I’ve tried so far, is this correct?

shotcut%20other

If not, what is correct? Any help would be appreciated. Thanks

2

Yes, preset=___ in Other is the correct way to choose a x264 preset. We use FFmpeg, which has some AVOptions (FFmpeg terminology) that map to x264 parameters. (Run ffmpeg -h encoder=libx264 to see a list of these options.)

But FFmpeg and Shotcut also have x264-params. In Other, the sytnax is x264-params=<x264param1>=<x264value1>:<x264paramN>=<x264valueN>.

Where can I see a log of it.

Right-click an export job to get a menu to access the log.

1 Like
3

So it should look exactly like this?..

shotcut%20format

4

No, do not include angle brackets.
x264-params=aq-mode=2:aq-strength=2.0:subme=6

1 Like
5

Thank you so much you’ve been very helpful.

6

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