That’s because I’m producing new MP4 files that FFmpeg would encode recursively if I save them to the same folder. First, I’m sending the files to the output folder I created (FFmpeg won’t create it for you you have to create it beforehand). “output\%%~na_crf.mp4” – Two things going on here. FFmpeg will pass through the audio which is fine here, so I’m not specifying audio parameters. – crf 23 – this is the FFmpeg command which will encode all files to CRF 23 quality level. To call multiple sets, list them separately like this (*.mp4 *.mov *.avi).įfmpeg -i “%%a” – this calls FFmpeg and identifies the files to be encoded, essentially all the files in the set (e.g. (*.mp4) – this is the “set” of files, in this case, all MP4 files in the folder I’m running the batch in. Note that you can use either lower case or upper case letters, but it must be a letter and you have to be consistent with all mentions. Use a single % sign when working directly in the command prompt use %% when working with a batch file. %%a – This identifies the “variable” you’ll encode throughout the string. Here’s the command: for %%a in (*.mp4) DO ffmpeg -i "%%a" -crf 23 "output\%%~na_crf.mp4"įor – calls the “for loop,” which applies the command to all specified files or folders. So, I created a one-line batch file to encode these files to CRF using FFmpeg. I know the data rate is unnecessarily high, but AME doesn’t offer a mode like Constant Rate Factor which will ensure quality at a much lower bitrate. I outputted from AME at about 10 Mbps to ensure quality, but now I’m left with 3 GB of files to upload. I just finished my Produce Videos with FFmpeg course which I recorded with Camtasia, edited in Adobe Premiere Pro, and output in the Adobe Media Encoder (AME).
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