[Cin] xavc-intra class 480

[Andrew Randrianasulu]

вт, 29 апр. 2025 г., 00:54 Phyllis Smith <phylsmith2017 at gmail.com>:

> Checked into GIT a modified AVC_Intra_100.mp4 with a comment added at the
> beginning:
>
>>   # Modify the 100 in avcintra-class=100 to 200, 300 or 480 as needed.
>>
> and removed "level=4.1" since in my testing that was the default for
> avcintra-class=100. So users will not have to modify the level number when
> modifying the class number (200 is level 5 by default).
>
> That is the beauty of the render formats --users can easily change
> values.  BTW - it creates a huge file when you get to level 200 so I did
> not test 300 or 480.
>

yeah ... thanks for testing!





> P.S. I forgot to test/checkin AVC_Intra_100.mov but will not forget to do
> so later.
>
> On Fri, Apr 25, 2025 at 4:16 PM Andrew Randrianasulu <
> randrianasulu at gmail.com> wrote:
>
>>
>>
>> сб, 26 апр. 2025 г., 01:04 Phyllis Smith <phylsmith2017 at gmail.com>:
>>
>>> Andrew, should these be checked into GIT source as is?  I was waiting to
>>> see if any followup on your 2 question commentaries.
>>>
>>
>> Honestly I am mot sure, difference is small, may be we can collapse all
>> 200/300/480 lines as comments in already existing avcintra100 profile?
>>
>>>
>>> On Mon, Apr 21, 2025 at 4:33 PM Andrew Randrianasulu <
>>> randrianasulu at gmail.com> wrote:
>>>
>>>> I tried to add other xavc classes as mp4 profiles (see attached patch,
>>>> do not forgot to make install after patching), but without altering bt709
>>>> x264 params line - may be we should comment it so it can be overridden by
>>>> bt2020 colorimetry?
>>>>
>>>> also, those does not set flavor sony, may be they should?
>>>>
>>>> I also try to develop xavc mxf profiles on desktop (those are from
>>>> Termux, 3 fps encode at FHD ;)
>>>>
>>>> вт, 22 апр. 2025 г., 00:54 Andrew Randrianasulu <
>>>> randrianasulu at gmail.com>:
>>>>
>>>>> In attempt at speeding up hdr10 4k HEVC video playback I tried to
>>>>> re-encode it into AVC-intra using this guide:
>>>>>
>>>>>
>>>>> https://www.voukoder.org/forum/thread/1163-replicate-sony-s-xavc-i-s-format/
>>>>>
>>>>> basically either
>>>>>
>>>>> ffmpeg -i input -c:v libx264 -avcintra-class 480 -pix_fmt yuv422p10le
>>>>> -preset ultrafast -x264opts avcintra-flavor=sony -c:a pcm_s24le -ar
>>>>> 48k output.mxf
>>>>>
>>>>> or for half size
>>>>>
>>>>>  ffmpeg -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov
>>>>> -s 1920x1080 -c:v libx264 -avcintra-class 200 -pix_fmt yuv422p10le
>>>>> -preset ultrafast -x264opts avcintra-flavor=sony -c:a pcm_s24le -ar
>>>>> 48k output-half.mxf
>>>>>
>>>>> Note, line errors out when I tried class 480 for 1920x1080 frame size
>>>>>
>>>>> Both files load into cingg
>>>>>
>>>>> Original file (4k hdr hevc, 59.94 fps) plays at around 22 fps at
>>>>> output x11, project rgba-float. But seeking is sad. Not to mention
>>>>> lack of tonemapping.
>>>>>
>>>>> First 4k avc-intra 4k reencode plays at around 33 fps and seeks much
>>>>> better (no artefacts)
>>>>>
>>>>> 1920x1080 proxy plays at 60 fps, and if I check play every frame and
>>>>> try 2x speed forward - at 83 Fps.
>>>>>
>>>>> But trying two FullHD tracks referencing same "proxy" file set to
>>>>> different fade leves with project set to RGBA-float kills fps back to
>>>>> 2-3 :)
>>>>>
>>>>> Encoding at ultrafast preset was 4.5 fps for 4k version and 12 fps for
>>>>> FullHD version.
>>>>>
>>>>> Filesizes:
>>>>>
>>>>> du -h *.mxf
>>>>> 1.0G    output-half.mxf
>>>>> 2.2G    output.mxf
>>>>>
>>>>> this is just for
>>>>> frame= 1149
>>>>> time=00:00:19.15
>>>>>
>>>>> Well, I guess without some serious GPU upgrade  this machine not gonna
>>>>> play HDR 4k :)
>>>>>
>>>>> Regular 8 bit/SDR 4k somewhat plays in firefox (if file just av1, 24
>>>>> fps), at least on Linux where I can set GPU frequency a bit higher
>>>>> than default on nouveau/libre drivers.
>>>>>
>>>>
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