I have recorded screencast video with GtkRecordMyDesktop, in ogg format. Microphone was wrongly placed and recorded sound is very quiet. Is there any way to increase sound loudness?
Update:
When I try to convert video with ffmpeg:
ffmpeg -i lecture3_2013.16.09.ogv -vol 1280 lecture3_2013.16.09-loud.ogv
sound becomes louder, but video quality becomes poor. I can cut sound off the video and convert it:
ffmpeg -i lecture3_2013.16.09.ogv -vn audio.ogg
ffmpeg -i audio.ogg -vol 1280 audio-loud.ogg
But when I merge it back into video:
ffmpeg -i lecture3_2013.16.09.ogv -i audio-loud.ogg lecture3_2013.16.09-loud.ogv
Quality becomes poor again :(
SOLUTION:
ffmpeg -i lecture3_2013.16.09.ogv -vn audio.ogg
ffmpeg -i audio.ogg -vol 2048 audio-loud.ogg
ffmpeg -i lecture3_2013.16.09.ogv -vcodec copy -an lecture3_2013.16.09-nosound.ogv
ffmpeg -i lecture3_2013.16.09-nosound.ogv -i audio-loud.ogg -vcodec copy lecture3_2013.16.09-loud.ogv