how to improve the quality of resultant video when merging audio-video with ffmpeg? <p>When merging an audio and video with ffmpeg, the quality of the resultant video goes down. How to we improve the quality(esp. the audio quality)?</p> <p>The audio quality gets degraded to quite an extent with random screeches in between. I've tried converting the audio to mp3 and video to mp4 before merging them, tried various audio-video parameters like bitrate, sample-rate, qscale etc but still unsuccessful. Any help would be greatly appreciated!</p>