Little question about video options

[nodiaque]

Hello,

I'm currently creating my own preset file for converting BD to MKV. I have a many working preset depending on source (anime, film, etc.) but there is something I don't get when checking the video options command line.

I'm using h.264 format, x264 encoder, 2-pass mode with video bitrate of 5000kbps. Source is set to auto. (weirdly, my movie end-up with 8000-12000 kbps).

x264 is using profile high10 4.1, Custom Preset, film Tune, GOP 25~250, 5 ref frame, subme 7, ME UMH 32 with 10 b-frame optimal.

I see all of that in the command line, with the other advanced option I selected. But there is one setting I don't see: --bframes 10. Changing b-frames number change nothing on the command line

Even weirder, I see 2 time --ref 5.

x264_10bpp --no-progress --profile high10 --tune film --weightp 2 --b-pyramid strict --scenecut 40 --rc-lookahead 50 --b-adapt 2 --level 41 --keyint 250 --min-keyint 25 --non-deterministic --ref 5 --aq-mode 1 --aq-strength 1.0 --subme 7 --ref 5 --me umh --merange 32 --psy-rd 1:0 --bitrate $(VideoBitrate) --qcomp 0.6 --sar 1:1 --threads 11 --stats "$(PassLogFile)" --pass 1 -o NUL -

x264_10bpp --no-progress --profile high10 --tune film --weightp 2 --b-pyramid strict --scenecut 40 --rc-lookahead 50 --b-adapt 2 --level 41 --keyint 250 --min-keyint 25 --non-deterministic --ref 5 --aq-mode 1 --aq-strength 1.0 --subme 7 --ref 5 --me umh --merange 32 --psy-rd 1:0 --bitrate $(VideoBitrate) --qcomp 0.6 --sar 1:1 --threads 11 --stats "$(PassLogFile)" --pass 2 -o "$(DestFile)" -

Using Mediacoder x64 0.8.28.5582 Full Edition

[meRobs]

You don't always get the chosen/set bitrate, it depends on what the encoder considers the max for that scene.
Suggest you read some of the Guides listed under Tips & Guides (link below), especially the ones on H.264 and multi-pass.
Also, I have never tried a large setting for B-frames, which sets the max number, not the actual number used.

[nodiaque]

Yeah, I've read about the bitrate and b-frame settings. I set it to 10 for film and 16 for animations. I get a better compression ratio at same quality for a little more time. Thing is, why is bframe settings not in the command line? I feel like the settings isn't getting used. I know it's the max consecutive bframe, which is why it's better for animation to have higher possible number (better compression then p frame).

I've copied the command into handbrake advanced with the added bframe 10 and I get a compression time of 2h30 instead of 6h, for a 2h movie. I find the number very odd for handbrake. I'm still waiting for it to finish to check for file size and quality. If it's the same as mediacoder eith same settings, I gotta find what handbrake does to speedup things like that.

edit: nevermind on the encoding time, the time reporting was bad because of the first pass. It now have over 4h to go

[nodiaque]

Just checled the console window and the bframe value isn't passed to the compiler. I see, in x264 info: bframe=5, while it is set as 10 in program.

[stanley]

Number of bframes can't be bigger than reference frames.

[lerbon123]

I feel like the settings isn't getting used. I know it's the max consecutive bframe.

[terry123]

Suggest you read some of the Guides listed under Tips & Guides.

[camila]

If you can setup CUDA decoding on your system, you can accelerate a bit by off-loading decoding to GPU by using AviSynth as decoder in MediaCoder.

[stanley]

Camila is correct!