Questions tagged [h265]
The h265 tag has no usage guidance.
20
questions
1
vote
1answer
55 views
How to preserve colorspace in ffmpeg
I have a x264 video with yuvj420p(pc, smpte170m) color space and i want to convert this video to x265 and reduce its file size. I have used this command ffmpeg -i input.mp4 -vcodec libx265 -crf 20 ...
0
votes
0answers
24 views
Video coding : H264 is transcoded to H265. Result looks sharper despite lower bit rate. What is most likely explanation?
Video coding : H264 is transcoded to H265 using "slow" preset.
When playing the video files (using VLC), the result looks sharper despite lower bit rate (10 Mb/s --> ca 1.5 Mb/s) and ...
0
votes
2answers
282 views
Does HEVC Support 16-Bit RGB Color Format?
I have some 3D Rendered Frames in 16-bit rgba Color Format.... I don't Wanna Lose Any Data... Because I have to Use those in editing.... But With Thousands of Frames in 4K File Size Matters.... So Why ...
1
vote
0answers
187 views
Why has grayscale a higher bitrate than YUV with H.265/HEVC?
For compression purposes, I am re‐encoding a grayscale video to the H.265/HEVC codec. Although the input video is more or less perfectly grayscale in aspect, it is provided in the yuv420p pixel format....
0
votes
0answers
240 views
How to configure B-frames (with no leading P-frames) in x265
I have been rolling around with my studies in x265 encoder for days by following this online x265 docs and this article. But I cannot figure out how to set the x265 encoder to code only I- and B-...
0
votes
0answers
32 views
Conversion of AVI H265 video for processing
I've been struggling with this for days with little success and really hope someone can help.
I have video files in .avi H.265 (HEVC) format. There are about 1000 of these videos that I need to edit. ...
1
vote
1answer
1k views
ffmpeg/x265: fixed-GOP, IDR only keyframes, repeating headers
I need to transcode a video to another one with the following properties:
GOP size is always fixed at a given value
Only IDR frames are used as key-frames (not I-slices)
SPS/PPS/VPS frames are ...
1
vote
1answer
1k views
Recompressing 1080p h264 collection to HEVC - Target Bitrate For Minimal Loss
My understanding is that HEVC (aka h265) can provide roughly the same video quality as h264 in roughly half the space, for 1080p+ footage. I have a large collection that I would like to re-encode to ...
0
votes
0answers
1k views
Help decoding video from hardware encoder
I obtained this video from directly reading the memory of a hardware encoder. The encoder supposedly produces a HEVC (H.265) or H.264 video stream, but I can't accurately play or convert the file with ...
3
votes
1answer
75 views
H.265 disadvantages with video dimensions not multiple of 8
Are there any disadvantages (like worse image quality/more compression artefacts) when encoding a video in H.265 with dimensions that are not a multiple of 16 or 8, but instead a multiple of 4 or 2?
...
3
votes
0answers
3k views
Nginx RTMP didn't accept HEVC h265 input format
I'm trying to created live event broadcast on my VPS server , to make the audience able watch my broadcast I use Nginx RTMP that's produce link at this format http://192.168.1.5:8080/hls/live.m3u8 ...
0
votes
0answers
1k views
Replacing I-frames in h265 stream
I'm trying to follow this tutorial: https://www.reddit.com/r/brokenanimegifs/wiki/tutorial
Everything works perfectly. On the basis of this tutorial, I even created my own little tool. It just ...
1
vote
1answer
680 views
libx265 NUMA pool configuration misleading
I have the following scenario: Using libx265 and a dual-socket system (thus 2 NUMA nodes) I want to encode videos using ffmpeg and libx265. libx265 can be configured to use thread-pools which are ...
2
votes
2answers
12k views
Handbrake x265 Optimal settings for ripping DVD
I want to rip DVDs(MPEG2) to MKV using Handbrake for viewing on PC, and currently i am not sure about the settings of the x265 encoder.
Can anyone suggest the optimal settings for:
CRF : 19 ? 23 ? 25 ...
0
votes
1answer
342 views
Is there any way to efficently compress multiangle recordings?
I have a DVD (a concert recording) which uses the multi angle feature for 3 different angles. I just encoded it with Handbrake on 3 separate but identical machines (all of the same model and maker, ...
1
vote
1answer
2k views
How to extract frames and saving frame type to filenames with ffmpeg?
I have a research project where I need to apply very, very computationally heavy image filters on a h264 video. Due some restrictions outside my control I have to use proprietary filter that works ...
1
vote
1answer
3k views
Re-encode with ffmpeg using libx265 - rawvideo
I have a script that is going through a media library and re-encoding files to HEVC with ffmpeg and using libx265. The default command I use is:
ffmpeg -i "$origFile" -map 0 -c copy -c:v libx265 -...
4
votes
1answer
605 views
.mkv file not playing in HEVC/H.265 supported player
I wanted to play UHD (4k) videos in my new LeTV (Super3 X55).
So I used youtube-dl to download 4k YouTube videos (which are humongous btw) but for some reason most of them do not play.
The TV's ...
0
votes
1answer
848 views
Android - Media Encoder HEVC Plays, FFMPEG HEVC Won't
The Problem
I've been fighting with this for days. I'm writing a video application for Android to be used on an Odroid C2. I've been simultaneously developing some scripts that utilize ffmpeg to ...
0
votes
2answers
842 views
How h265 settings / presets affects the target device cpu while decoding and how can I tweak them?
h265 is a very powerful but still not widely supported codec, recently I found myself in the need of prepare some h265 videos and have them played on various smartphones.
While a powerful desktop pc ...
