bytedeco/javacv

How to merge 3 commands to only one command to save process time.

Open

#1,024 opened on Jul 2, 2018

View on GitHub
 (1 comment) (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

Hi @saudet, How to merge 3 commands bellow to only one command to save proces time:

  1. String joinVideos = "-i " + input1 + " -i " + input1 + " -filter_complex [0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a] -map [v] -map [a] -b:v 3650000";

  2. String addOverlay = "-i " + input1 + " -i " + overlayInput + " -filter_complex overlay=1:1 -b:v 3650000";

  3. String rotateVideo = "-i " + input + " -vf transpose=1 -b:v 3650000";

Thank you so much!

Contributor guide

Research direction
Study how to chain FFmpeg filters in a single filter complex to combine video joining, overlay, and rotation in one command. Use the concat filter followed by overlay and then transpose in the same filtergraph.
Tech stack
java
Domain
backend
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
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.
85