bytedeco/javacv

avfilter_graph_parse_ptr() error -22 while merging two music with different sample rate

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#1,736 opened on Jan 7, 2022

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Description

Hi, I want to merge two music with different sample rate(44100 and 48000), and I push their samples to two FFmpegFrameFilter(A, B) with different sample rate. And I want merge these two filters into the one, how can I do this?

I create third filter(C, 44100) uses [0:a][1:a]amix=inputs=2:duration=longest[a]. And I push Samples that pulled by A and B to C. But I get the error message (avfilter_graph_parse_ptr() error -22) while pushing B's samples.

So, what is the correct way of merging two music with different sample rate?

Thanks.

Contributor guide

Research direction
Investigate how to use the aresample filter to convert sample rates before merging with amix.
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.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
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
Javaaudio processing basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60