bytedeco/javacv

FFmpegFrameRecorder encoding problem frame

Open

#2,269 opened on Aug 8, 2024

View on GitHub
 (5 comments) (0 reactions) (0 assignees)Java (1,583 forks)batch import
help wantedquestion

Repository metrics

Stars
 (6,985 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

Hello what is the format to encode a frame i use the otaliastudios camera preview plugin for android i get the frame in the addFrameProcessor function the format of the frame is : 17

i get the bitmapbytes : final byte[] mdata = frame.getData();

and i put it directly the buffer ((ByteBuffer)yuvImage.image[0].position(0)).put(mdata);

but the video is black

i set the recorder with this parameters recorder.setFormat("mp4"); recorder.setVideoCodecName("libopenh264");

i tried also to change recorder.setPixelFormat();

thanks for your help

Contributor guide

Research direction
Check the pixel format of the incoming frame from the camera plugin. The format value 17 likely corresponds to NV21. Ensure you set recorder.setPixelFormat(AV PIX FMT NV21) and that the buffer contains the proper NV21 byte layout. Also verify the image dimensions and that the recorder's video bitrate is sufficient.
Tech stack
javaandroid
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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.
Mostly clear
Prerequisites
JavaAndroidFFmpeg basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50