<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">вт, 29 апр. 2025 г., 00:54 Phyllis Smith <<a href="mailto:phylsmith2017@gmail.com" rel="noreferrer noreferrer" target="_blank">phylsmith2017@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small">Checked into GIT a modified AVC_Intra_100.mp4 with a comment added at the beginning:</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="gmail_default" style="font-size:small"> # Modify the 100 in avcintra-class=100 to 200, 300 or 480 as needed.</div></blockquote><div class="gmail_default" style="font-size:small">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). <br></div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">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.</div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">yeah ... thanks for testing!</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">P.S. I forgot to test/checkin AVC_Intra_100.mov but will not forget to do so later.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 25, 2025 at 4:16 PM Andrew Randrianasulu <<a href="mailto:randrianasulu@gmail.com" rel="noreferrer noreferrer noreferrer" target="_blank">randrianasulu@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">сб, 26 апр. 2025 г., 01:04 Phyllis Smith <<a href="mailto:phylsmith2017@gmail.com" rel="noreferrer noreferrer noreferrer" target="_blank">phylsmith2017@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small">Andrew, should these be checked into GIT source as is? I was waiting to see if any followup on your 2 question commentaries.<br></div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">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?</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small"></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 21, 2025 at 4:33 PM Andrew Randrianasulu <<a href="mailto:randrianasulu@gmail.com" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">randrianasulu@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div>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?</div><div dir="auto"><br></div><div dir="auto">also, those does not set flavor sony, may be they should?</div><div dir="auto"><br></div><div dir="auto">I also try to develop xavc mxf profiles on desktop (those are from Termux, 3 fps encode at FHD ;) <br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">вт, 22 апр. 2025 г., 00:54 Andrew Randrianasulu <<a href="mailto:randrianasulu@gmail.com" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">randrianasulu@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">In attempt at speeding up hdr10 4k HEVC video playback I tried to<br>
re-encode it into AVC-intra using this guide:<br>
<br>
<a href="https://www.voukoder.org/forum/thread/1163-replicate-sony-s-xavc-i-s-format/" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.voukoder.org/forum/thread/1163-replicate-sony-s-xavc-i-s-format/</a><br>
<br>
basically either<br>
<br>
ffmpeg -i input -c:v libx264 -avcintra-class 480 -pix_fmt yuv422p10le<br>
-preset ultrafast -x264opts avcintra-flavor=sony -c:a pcm_s24le -ar<br>
48k output.mxf<br>
<br>
or for half size<br>
<br>
ffmpeg -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov<br>
-s 1920x1080 -c:v libx264 -avcintra-class 200 -pix_fmt yuv422p10le<br>
-preset ultrafast -x264opts avcintra-flavor=sony -c:a pcm_s24le -ar<br>
48k output-half.mxf<br>
<br>
Note, line errors out when I tried class 480 for 1920x1080 frame size<br>
<br>
Both files load into cingg<br>
<br>
Original file (4k hdr hevc, 59.94 fps) plays at around 22 fps at<br>
output x11, project rgba-float. But seeking is sad. Not to mention<br>
lack of tonemapping.<br>
<br>
First 4k avc-intra 4k reencode plays at around 33 fps and seeks much<br>
better (no artefacts)<br>
<br>
1920x1080 proxy plays at 60 fps, and if I check play every frame and<br>
try 2x speed forward - at 83 Fps.<br>
<br>
But trying two FullHD tracks referencing same "proxy" file set to<br>
different fade leves with project set to RGBA-float kills fps back to<br>
2-3 :)<br>
<br>
Encoding at ultrafast preset was 4.5 fps for 4k version and 12 fps for<br>
FullHD version.<br>
<br>
Filesizes:<br>
<br>
du -h *.mxf<br>
1.0G output-half.mxf<br>
2.2G output.mxf<br>
<br>
this is just for<br>
frame= 1149<br>
time=00:00:19.15<br>
<br>
Well, I guess without some serious GPU upgrade this machine not gonna<br>
play HDR 4k :)<br>
<br>
Regular 8 bit/SDR 4k somewhat plays in firefox (if file just av1, 24<br>
fps), at least on Linux where I can set GPU frequency a bit higher<br>
than default on nouveau/libre drivers.<br>
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