ffmpeg and encoding blu-ray to x265

[madhatr]

First i'd like to say thanks, I've been reading this forum for a week or so now getting lots of info for what I have been doing. I like the results I am getting but now I have some question about the way I have been doing things.

To encode my x265 from Blu-ray. I use ffmpeg.

I decompress the video from the m2ts file into a YUV 420 pix fmt
I pull out the audio track I want with copy
I then run the YUF through ffmpeg with x265 and CRF
I then merge the video and audio into an mkv(yes audio is untouched)
I am happy with the result

What I want to know is it necessary to extract the 500GB YUV file? Is there a way around that. Something that say does it on the fly?

Also how can I streamline it? I do each of these steps by manually typing into console to ffmpeg

Sorry if I didn't get exact with the commands, I don't have the memorized yet. if its important I'll get the exact details.

Edit: Just realised I can grab the audio and toss it into the mkv at the same time I encode. Here is the exact command I used
ffmpeg -f rawvideo -vcodec rawvideo -s 1920x1080 -r 23.976 pix_fmt yuv420p -i input.yuv -i audio.dts -c:v libx265 -preset medium -x265-params crf=20 -c:a copy output.mkv

Edit: switch my commandline from x264(typo) to x265

[Baldrick]

Why can't you work with m2ts directly? After you ripped i then.

[pandy]

Performing m2ts to raw is necessary step - go directly from rip to h.265, beware that x265 support in ffmpeg is seriously limited (practically broken as additional x265 parameters are ignored, also most popular ffmpeg builds may use outdated x265 library).

[madhatr]

I read somewhere that x265 needs to work from raw video and not x264 or vnc1 encoded stuff. Is this no longer the case?(may have been outdated docs) I also thought working with an uncompressed file would give better results. I am new so I don't know a lot about it all yet.

So you guys are saying I can do
ffmpeg -i video.m2ts -i audio.dts -c:v libx265 -preset medium -x265params crf=20 -c:a copy output.mkv

and I would get the same result? I'll test it out. please do still reply as I'd like to hear from you and learn more.

Pandy: Did you mean unnecessary step? Or am I doing it right. Also sounds like your saying I should compile ffmpeg myself with the newest x265 libs?

[pandy]

I read somewhere that x265 needs to work from raw video and not x264 or vnc1 encoded stuff. Is this no longer the case?(may have been outdated docs) I also thought working with an uncompressed file would give better results. I am new so I don't know a lot about it all yet.

So you guys are saying I can do
ffmpeg -i video.m2ts -i audio.dts -c:v libx265 -preset medium -x265params crf=20 -c:a copy output.mkv

and I would get the same result? I'll test it out. please do still reply as I'd like to hear from you and learn more.

Pandy: Did you mean unnecessary step? Or am I doing it right. Also sounds like your saying I should compile ffmpeg myself with the newest x265 libs?

Don't confuse x265.exe ( itself not supporting anything except raw video at the input ) with ffmpeg libx265 - in ffmpeg case it use same x265 but in a form of library and ffmpeg provide raw automatically - also as a alternative you can use ffmpeg piping to x265.exe so raw video will be dynamically produced by ffmpeg for x265.exe.

So once again raw video is required for x265.exe but it is not required if you use ffmpeg x265 library.

[madhatr]

Thanks that makes sense. That will speed things up quite a bit for me.

I have another question. I noticed when I am all done encoding and use mediainfo to check out the file. It shows me the over all bitrate and the dts tracks bitrate but not an individual bitrate for my video track. When I encoded did everything separately I was able to check the video only file for bitrate, is there a way or a flag to add to ffmpeg to ensure this stat is retained in the info?

[hello_hello]

I have another question. I noticed when I am all done encoding and use mediainfo to check out the file. It shows me the over all bitrate and the dts tracks bitrate but not an individual bitrate for my video track. When I encoded did everything separately I was able to check the video only file for bitrate, is there a way or a flag to add to ffmpeg to ensure this stat is retained in the info?

I assume you're referring to MKVs? I don't understand the limitation but it's an MKV issue.
If the audio is variable bitrate you probably won't see any audio bitrate either.

MKVMergeGUI was given the ability to write tags containing that info somewhat recently, and the latest version of MediaInfo finally knows what they are and displays the bitrate info correctly. I don't think ffmpeg writes the statistic tags.

[Kvach]

Hi
where i can find command line for ffmpeg 2pass encoding x265 (linux and windows) with some presets like in x264 film and slowest mode. It's create log file in 1st pass like x264? Do you know any guide?
Find here https://forum.videohelp.com/threads/371616-2pass-encoding-%28ffmpeg-libx265%29

[pandy]

Hi
where i can find command line for ffmpeg 2pass encoding x265 (linux and windows) with some presets like in x264 film and slowest mode. It's create log file in 1st pass like x264? Do you know any guide?
Find here https://forum.videohelp.com/threads/371616-2pass-encoding-%28ffmpeg-libx265%29

Few weeks ago ffmpeg (Zeranoe builds tested) x265 parameters was mostly ignored by ffmpeg (not sure why) - only way to create h.265 is pipe from ffmpeg to x265 encoder and then pipe from x265 to ffmpeg (muxing to some container)...

[Kvach]

x265 encoder can get raw video from std in/out console something like ffmpeg bla bla bla | x265 encoder ?

[pandy]

x265 encoder can get raw video from std in/out console something like ffmpeg bla bla bla | x265 encoder ?

Yeep, more or less something like this:

@ffmpeg -thread_queue_size 512 -i %1 -an -pix_fmt yuv420p -f yuv4mpegpipe - | x265 --y4m -p preset --crf 20 -t tune --input - --output - | ffmpeg -fflags +genpts -thread_queue_size 512 -i - -c:v copy -f mpegts -shortest -y %1.ts

[Kvach]

-f yuv4mpegpipe

or

-f rawvideo

what better?
how x265 get fps and res ? i added manually

--input-res 1920x1080 --fps 29.970

and

-loglevel quiet

[pandy]

With yuv4mpegpipe all informations are passed automatically and if you insist to set framerate manually then set it correctly: 30000.0/1001.0 - this is huge difference when compared to 29.970.

[Kvach]

--y4m

this mean i get info from pipe?

[pandy]

--y4m

this mean i get info from pipe?

http://wiki.multimedia.cx/index.php?title=YUV4MPEG2

[Kvach]

pandy
thanks you so much!!!