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Old 12th January 2018, 11:38   #5821  |  Link
froggy1
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Originally Posted by psyside View Post
I'm a noob, i couldnt find any other thread to ask.

Alsoi have downloaded video from youtube, which in the media info states VP9/HEVC?
if you haven't found a thread, start a new one! it's that simple
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Old 12th January 2018, 18:54   #5822  |  Link
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Yes, if someone was seeking to (starting playback from) the IDR frame, any RADL B frames (which come after the IDR frame in decoding order) would be dropped, as they represent frames that come before the IDR frame in presentation order.

The term "current GOP" can be a bit confusing when we're talking about leading pictures. RADL B pictures require the IDR picture (the first frame of the next GOP) as a reference. But the decoder knows this already, as the NAL unit type of the IDR picture will indicate that leading pictures (from the previous GOP) follow the IDR picture in decode order (it will be an IDR_W_RADL as opposed to an IDR_N_LP - IDR with no leading pictures).
Is there a recommendation on using RADL? Is it something that can be safely used in all fixed-GOP encodes to potentially increase quality?

From the description, it sounds like the fundamental technology could also be used in variable duration Closed GOP as well.
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Old 13th January 2018, 15:00   #5823  |  Link
Ma
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from 2.6(+22 and +24), it seems some problem in my computer.
[...]
2.6+17 was OK.
2.6+22/+24 was wrong.
In commit a3334a2 (ver. 2.6+19) there are 2 new options: "analysis-load" and "analysis-save". In function x265_param2string all options are written to a memory buffer in text form (readable), the buffer size was only 2000 bytes, with example that hangs in my system it was 2028 bytes to write.

The bug is critical (even if it not hangs it writes to unknown memory) so we should fix this -- you can try patch 19377 and report back if it helps.

I've prepared binaries with this patch (and patches 19378, 19379 which are not so important): x265p-2.6+27-2f3c415_vs2015.7z
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Old 14th January 2018, 10:18   #5824  |  Link
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Can anyone explain the situation where --rd-refine could be useful? I.e. is it meant to battle against some specific issue?
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Old 14th January 2018, 13:38   #5825  |  Link
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Can anyone explain the situation where --rd-refine could be useful? I.e. is it meant to battle against some specific issue?
I found when used it seems to improve the picture quality, sujectively of course. I think it may affect detailed low light scenes more so than other situations. Admittedly I haven't tried it on and off for a while, other changes may negate its benefits.
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Old 14th January 2018, 22:35   #5826  |  Link
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Since when does x265 have a sub-CTU quantization group setting of 8 (instead of minimum 16) available? That's new, isn't it? Maybe it's been there a while and I'm just not remembering.
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Old 16th January 2018, 02:28   #5827  |  Link
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Originally Posted by Ma View Post
In commit a3334a2 (ver. 2.6+19) there are 2 new options: "analysis-load" and "analysis-save". In function x265_param2string all options are written to a memory buffer in text form (readable), the buffer size was only 2000 bytes, with example that hangs in my system it was 2028 bytes to write.

The bug is critical (even if it not hangs it writes to unknown memory) so we should fix this -- you can try patch 19377 and report back if it helps.

I've prepared binaries with this patch (and patches 19378, 19379 which are not so important): x265p-2.6+27-2f3c415_vs2015.7z
It works for me. Thanks in advance.
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Old 16th January 2018, 16:24   #5828  |  Link
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x265_2.6+31-3712d13c09bf
  • important stability fix when using very verbose parameters like zones and additional files (could exceed a too small internal buffer)
  • input: change from ifstream to stdio stream
  • change date to 2018 in output file header
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Old 16th January 2018, 18:41   #5829  |  Link
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Hi everyone.
I've been the head of the x265 project and the head of MulticoreWare's video business from the start. But I need to let you know that I've decided to move on, joining Beamr as VP Strategy. x265 has a strong team, and it's in good hands. I'll hand this Doom9 account over to someone on the MulticoreWare team.

Tom
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Old 16th January 2018, 18:44   #5830  |  Link
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Sad to hear you leave the x265 project, but wish you good luck&co at Beamr.
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Old 16th January 2018, 19:00   #5831  |  Link
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Originally Posted by x265_Project View Post
Hi everyone.
I've been the head of the x265 project and the head of MulticoreWare's video business from the start. But I need to let you know that I've decided to move on, joining Beamr as VP Strategy. x265 has a strong team, and it's in good hands. I'll hand this Doom9 account over to someone on the MulticoreWare team.

Tom
Sad to hear that ur leaving x265. Good luck with Beamr.

Sent from my SM-G935F via Tapatalk
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Old 16th January 2018, 19:03   #5832  |  Link
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Be well and best success, Tom. And we will appreciate your (team's) continued contact and support – here and elsewhere.
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Old 16th January 2018, 22:21   #5833  |  Link
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Thanks for everything Tom! Be well, good luck in your future endeavors!
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Old 16th January 2018, 23:24   #5834  |  Link
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Originally Posted by x265_Project View Post
Hi everyone.
I've been the head of the x265 project and the head of MulticoreWare's video business from the start. But I need to let you know that I've decided to move on, joining Beamr as VP Strategy. x265 has a strong team, and it's in good hands. I'll hand this Doom9 account over to someone on the MulticoreWare team.

Tom
thanks for everything and good luck
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Old 18th January 2018, 06:05   #5835  |  Link
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Originally Posted by x265_Project View Post
Hi everyone.
I've been the head of the x265 project and the head of MulticoreWare's video business from the start. But I need to let you know that I've decided to move on, joining Beamr as VP Strategy. x265 has a strong team, and it's in good hands. I'll hand this Doom9 account over to someone on the MulticoreWare team.

Tom
Thanks for everything and best of luck in your future endeavors.
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Old 18th January 2018, 16:48   #5836  |  Link
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change picture size mid-encode

My raw picture size varies from time to time. For instance, I get 250 frames in 1080p for the first 10 secs, and then another 250 frames in 720p in the second 10 secs, and so on. And i need to encode all these frames into a same HEVC bit stream. I found no appropriate command line option, and thus looked into the apis. The x265_encoder_reconfig() seems to be a possible solution, but I am not sure. Can someone share some ideas or experiences?
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Old 18th January 2018, 17:18   #5837  |  Link
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Sounds like DVB with different programmes; I believe this works only on a container level?!

Gosh, 5,000.
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Old 18th January 2018, 19:48   #5838  |  Link
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Gosh, 5,000.
OT: I'm more scared of the year 2001 Where did all the years go?
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Old 19th January 2018, 12:24   #5839  |  Link
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Sounds like DVB with different programmes; I believe this works only on a container level?!

Gosh, 5,000.
yes, containers supports video sections with different resolutions, and the output of my encoder will be put in a container.
Question is whether I have to create a new encoder when my picture size has changed or I just need to reconfigure my current encoder?
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Old 19th January 2018, 12:43   #5840  |  Link
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Considering you need a full decoder and bitstream reset anyway to change resolution, might as well create a new encoder? At least that is known to work.
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