Questions tagged [h265]

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VLC doesn't play mp4v video converted with VLC to h264/h265

VLC reports the original video as: Codec: MPEG-4 Video (mp4v) Video resolution: 8192x8192 Frame rate: 7.549296 I am using the Convert / Save option to convert the video using the following profile: ...
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1answer
329 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 ...
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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 ...
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2answers
520 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 ...
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0answers
451 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....
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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 ...
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2answers
2k 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 ...
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0answers
2k 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
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1answer
82 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? ...
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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 ...
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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 ...
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1answer
754 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 ...
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2answers
13k 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 ...
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1answer
368 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
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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
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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
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1answer
613 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 ...
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1answer
869 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 ...
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2answers
888 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 ...