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Questions tagged [h265]

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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....
Maëlan's user avatar
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1 vote
0 answers
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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: ...
Greg's user avatar
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Difference between crf and cq settings in ffmpeg

What is the difference between -crf and -cq parameters of ffmpeg? I am trying to compress 1080p h264 videos into 1080p h265 videos with high quality and low size. I have noticed that in some guides ...
jamana's user avatar
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1 answer
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Creating an 8K/4K video in ffmpeg from single image frame leads to video longer than audio

I want to make a video using a cover image and an audio file with the audio file as the length. What's the most optimal modern way to do this with new codecs and high resolutions? Reason why I want 4K/...
MyPreciousss's user avatar
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Help me with corrupt video mp42

Hello I have one corrupted video file created with Chinese Camera DV4K_V23. I created one small sample video from this camera and I uploaded it for someone to help me, to decipher exactly which ...
Dejan's user avatar
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84 views

Better compression for h265 transparent mov video

I created a 3d animation that I converted from an image sequence (211 pngs @ 30fps) using this command: ffmpeg -framerate 30 -pattern_type glob -i '*.png' -vf "scale=460:-1" -c:v libvpx-vp9 -...
flks's user avatar
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Why, in FFmpeg with libx265 the timestamp tbn parameter is always 1k even when it seems not logical?

I encode with ffmpeg and noticed that when I encode a y4m video in 29,97 FPS into a h265 video with libx265, the parameter of the two videos are the following : original y4m : 29.97 fps, tbc : 29.97 ...
Nils Beaussé's user avatar
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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 ...
Telmo Marques's user avatar
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2k 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 ...
bukkojot's user avatar
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