[Cin] xavc-intra class 480

[Phyllis Smith]

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.

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.
>>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20250428/44560e0c/attachment.htm>