[FFmpeg-user] Intermediate video format for Concatenation of video and images

Dzung Nguyen dzungng89 at gmail.com
Tue Aug 13 18:26:53 CEST 2013

Hi all,

I'm converting image to videos, and then merging them together (because the
length of the image slideshow is random, not fixed).

1) Image --> video:

ffmpeg -loop 1 -f image2 -i image.png -c:v libx264 -tune stillimage -t 30

2) Concatenate subvideos:

ffmpeg -f concat -i list.txt -c copy concatenated.mp4

Which format should I use when creating subvideos? I found that mpeg lose
the image quality, while using mp4 the output is unskippable.

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