Qscale determines the quality of the video. >ffmpeg -i -acodec aac -strict -2 -ab 160k -s 1024×768 -vcodec copy -f mp4 4 Attempt 4īecause the sound was good but the video poor, I Googled this issues and discovered the qscale setting. >ffmpeg -i -acodec aac -ac 2 -strict experimental -ab 160k -s 1920×800 -vcodec copy -f mp4 -threads 0 4

I used some of the above ideas but this new one resulted in blotchy, pixellated images at some points in the video (it was not bad, might have been OK on a small screen): Audio: dit rate: 93 kbps, channels 2 (stereo), audio sample rate 48 khz ……. Video: Frame width 1920, height 800, data rate 1955kbps, total bitrate 2049lbps, frame rate 23 fps. I was scratching my head over the settings and my pal suggested looking at the properties of a file that does work and look good. This worked, but poor quality (should be OK for ipads and other tablets):įfmpeg -i input.mkv -acodec aac -ac 2 -strict experimental -ab 160k -s 1920×1080 -vcodec copy -f mp4 -threads 0 output.mp4 What settings to use? It did work on VLC player I think (cannot confirm as I have deleted it).

The most basic way to convert a file is to input a command such as this: Then I opened the folder and double clicked the ff-prompt and this opened a command prompt for Ffmpeg. I downloaded the 32-bit static builds (which gave ffmpeg-latest-win32-static.7z) and unpackaged them with 7-Zip (which gave a folder called ffmpeg-20140702-git-42a92a2-win32-static).

Converting mkv to mp4 ffmpeg