[LAU] FFMPEG audio/video editing question

[Jeanette C.]

Hey hey,
I'm just trying to concatenate two mpeg4 videos that I have created with 
ffmpeg. One has a series of images (a true video), the other just has a still. 
Here's how they were created:
ffmpeg -loop 1 -y -i image.jpg -i sound.wav -acodec aac -vcodec mpeg4 -s 
1280x720 -shortest result.mp4
(the options from -vcodec to -s were later exchanged for the ones in the 
commandline below, almost same result)
ffmpeg -r 24 -start_number 1 -i image%03d.jpg -c:v libx264 -r 24 -pix_fmt 
yuv420p -i sound.wav -acodec aac out.mp4
(swapped the first commandline for everything from -c:v to -pix_fmt)

For concatenation I tried:
ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4
(where mylist.txt contained lines:
file file1.mp4
...
I also tried converting the mpeg4s to intermediate .ts files:
ffmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts 
intermediate1.ts
...
And then used:
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a 
aac_adtstoasc output.mp4

With the original options for the first and second video, the direct 
concatenation failed, because they apparently had different video/image 
formats.

After rerendering the still, they'd concatenate, but only play the first 
(moving) video correctly and then just skip through the rest. The same for the 
second concatenation method with intermediate .ts files.

Can anyone point out where I went wrong. Or even better give me a few correct 
commandlines. :)

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