bytedeco/javacv

Lossless conversion from an image to a video

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#2,322 opened on Mar 8, 2025

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Description

I'm trying to convert an image to a video using the following settings:

  recorder.videoCodec = avcodec.AV_CODEC_ID_FFV1
  recorder.pixelFormat = AV_PIX_FMT_RGB24;
  recorder.videoCodecName = "libx264rgb";
  recorder.videoQuality = 0.0;
  recorder.format = "avi"
  recorder.frameRate = 1.0
  recorder.videoBitrate = 2000000

The result came out is blurry and have different colours compare to the original image. The original image is a JPEG with RGB colour format, its size is about 67KB. May anyone suggest why this is the case? Thanks in advance

Contributor guide

Research direction
Investigate the pixel format and color space conversion. Ensure that the input image is converted to RGB24 before encoding with libx264rgb. Verify that the FFmpeg build supports lossless encoding and check the encoder options for 'ffv1' or 'libx264rgb'.
Tech stack
java
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaFFmpeg
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70