FFMPEG adding audio to mpg video => QT bug

[Tom2me]

Hi everyone,

As I'm new on this forum (though I've been visiting it for a while) I would like to say hi and thanks for your upcoming help.
I'm currently working with ffmpeg on a mac. I'm now trying to merge an audiofile to a video.
I used this (upon 100 others) command :

ffmpeg -i output.mpg -i audio.mp3 -ab 192k -vcodec copy outau.mpg

This is working but I've too problems :

- If I navigate through the video with QT then the audio stream stop.
- I would like to add the same amount of time of audio than the video and not a complete audio file (i.e my video is 1 min and my audiofile is 4 I would like to get only the first minute of audio to match the video and don't want the complete audio).

Thanks for all your help.

Best,

[bat999]

Hi

This is the command that I suggest:-

ffmpeg -i output.mpg -i audio.mp3 -shortest -vcodec copy -acodec copy outau.mpg

[Tom2me]

Hi

This is the command that I suggest:-

ffmpeg -i output.mpg -i audio.mp3 -shortest -vcodec copy -acodec copy outau.mpg

Thanks for this -shortest !
I didn't use -acodec copy because my original video file doesn't have any audio and then this command doesn't work.
It works for my second point sadly the first problem is still there : If I move on the video using the player navigator the sound stop to play.
Any ideas ?

EDIT : Someone ??

[ady477]

Hi, I have 2 files: Audio.wav (duration 1 minute 16 seconds) and Video.mp4 (duration 1 minute)
I have to pack both of these streams in a single video (op.mp4) with the following requirement:
Video will start playing after 16 seconds only till then black frames should appear.

How can this be done using ffmpeg?