FFAStrans forum

Here are the processes I have running right now:
1. MONITORS
.....a. Folder
........i. Folder: "E:\input
........ii. Accept Files: *.mxf
........iii. Deny Files:
........iv. Deny Attributes: checked "System" "Hidden"
........v. checked - "Create Folder, Recurse, and Localize File"
........vi. Limit File Size: "None"
2. DECODERS
.....a. A/V Media
........i. checked - "Use Audio, and Use Video"
........ii. Preparing: "Intelligent" on both
3. FILTERS
.....a. ChannelMapper
........ i. Channel Layout: "2 (stereo)"
4. ENCODERS
.....a. Custom FFmepg
........i. File input Format: "mxf"
........ii. Audio codec: checked aac
........iii. Video codec: checked mpeg4
........iv. option -c:v libx264 -crf 20 -maxrate 400k -bufsize 1835k -c:a aac -ac 2 -ar 44100 -ab 48k -pix_fmt yuv420p -map 0:0 -map 0:1 -map 0:2 -map 0:3 -map 0:4
........v. Extension .avi
........vi.
........vii.
6. DELIVERIES
..... a. Destination: Folder

I tried custom ffmpeg use default preset is fine , when change audio codec to aac is failed with No video or audio found in media.

Try replacing the command with:

-c:v libx264 -crf 20 -maxrate 400k -bufsize 1835k -c:a aac -strict -2 -ar 44100 -ab 48k -pix_fmt yuv420p

-steipal