Is it possible to generate an FLV out of an MP3 and a JPG, without uselessly looping the image and still be able to seek the audio ?
This command generates a non-seekable video:
ffmpeg -y -i audio.mp3 -i image.jpg -r 1 -acodec copy video.flv
and this one generates a seekable one, but with uselessly looping the image occupying both space and time:
ffmpeg -y -loop_input -i audio.mp3 -i image.jpg -r 1 -acodec copy video.flv -shortest