Comments on: FFmpeg: The ultimate Video and Audio Manipulation Tool

By: Devyani

Devyani — Thu, 05 Feb 2015 07:30:46 +0000

Hi, I need to know what options should I use to convert the .webm to .mp4 without losing on the quality.

By: Milind K.

Milind K. — Tue, 28 Oct 2014 18:12:14 +0000

Excellent guide.... I do have some problems though, every time I try to either reelcode or copy a .mp4 file to a new container it only takes the audio file, and there is no video in the new file. is there any problem with reelcode? please guide me

By: Raf

Raf — Thu, 23 Oct 2014 08:15:38 +0000

It's possible that original MKV uses an audio codec incompatible with MP4 container.

By: M. Usman Afzal

M. Usman Afzal — Wed, 12 Mar 2014 08:56:06 +0000

Hi, really good post so far I want few questions 1) How to concatenate multiple videos to form a single video 2) How to loop the video until the audio is not stop

Note: I have a different audio and video file

By: pushpa

pushpa — Mon, 10 Feb 2014 09:49:17 +0000

I am successfully able to convert a sequence of images into a video. But now my requirement is to put some transition effects like left to right ,top to bottom to be shown in video with the change of every image. Please provide me suitable ffmpeg command to have transition effects in video.

By: Vishal Parkash

Vishal Parkash — Sat, 21 Dec 2013 05:05:07 +0000

This is really helpful post.. actually making aware about the software. Good Job man.. very well done..

By: Dose

Dose — Tue, 01 Oct 2013 03:33:25 +0000

I am trying to convert mkv to mp4. I used following command to convert it.

ffmpeg.exe -i input.mv -c:v copy -c:a copy output.mp4

It converted very fast, but when I played there is not audio. Video quality is excellent. Original file has audio properly playing. Can you point me to fix this issue.

By: lakhan

lakhan — Sat, 08 Jun 2013 08:49:00 +0000

here is your solution

ffmpeg -i STREAM.MP4 -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 345k -s 640x360 output.ogv

ffmpeg -i STREAM.MP4 -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 345k -s 640x360 output.webm

ffmpeg -i STREAM.MP4 -acodec libfaac -ab 96k -vcodec libx264 -vpre slower -vpre main -level 21 -refs 2 -b 345k -bt 345k -threads 0 -s 640x360 output.mp4

By: slhck

slhck — Wed, 05 Dec 2012 14:18:16 +0000

Hi! Using the FFmpeg API is not the same as using the command line options. I've never used FFmpeg and the JNI, all I can say is that it's going to be way more difficult than just executing one shell command. So, you have two options: a) Compile a command-line version of FFmpeg for Android or b) learn the FFmpeg API with the JNI. In any case, you're going to find more info on that on Stack Overflow.

By: SKC

SKC — Wed, 05 Dec 2012 12:00:14 +0000

Hi, i was exploring all the ways of using FFMpeg functionalities.

Tried running FFMpeg commands using Android activity as a command line terminal, but was unable to do so on a unrooted device[Working directory comes as NULL everytime].
Tried exploring the JNI way of using different FFMpeg library functions and still looking into it.

Now my query, can i find the function definitions(or sample code) for the FFMpeg commands that we pass through commandline. Please let me know. For a command like ffmpeg -f image2 -r 10 -i %04d.png -vcodec copy output2.avi [to convert a series of images into a video], how can i implement the same using JNI calls from an android activity.Is is possible to call upon any direct function from the FFMpeg library to execute the above mentioned command.Please let me know your views on the same.