How to install ffmpeg without path on OS X Installing ffmpeg on OS X used to require install the homebrew framework first. Now that I’m using ffmpeg directly from the command line, I’d like to be able to run the ffmpeg binary without a path. To start this experiment is just used the most recent of the dozens of copies I have on this computer rather than reinstalling. You can choose whichever ffmpeg library you like on your computer. Gradually blocky shadows, chroma noise and jaggies will get worse. It’s basically like resaving a jpeg image. The downside is that it ages your video another generation. The benefit of re-encoding the file is that it will definitively remove any encoding errors. Users/Alec/Library/Application\ Support/FFmpegTools/ffmpeg -i "input.mp4" -c:v libx264 -crf 22 -preset slow output.mp4 There’s a more sophisticated version of the command above which performs a basic transcoding. Fixing more problematic files with ffmpeg What’s great about this command is that it’s almost instantaneous (400x real time speed) and does not re-encode so your output video remains the same generation as the input. Users/Alec/Library/Application\ Support/FFmpegTools/ffmpeg -i input.mp4 -c copy output.mp4 It took awhile to find the code to do this but eventually I did.Ī simple repackaging of the file is this command: I remembered hearing about a zero copy which could make broken mp4’s downloaded from the internet open and play again. mkv video file almost instantlyĮxperimenting with the Submerge ffmpeg preset files made me think more about using standalone ffmpeg (the engine in both ffWorks and Submerge) to clean up these files. Files created from Submerge hard-coded subtitle submasters with 1192 hour time codes after a second conversion in ffWorks also show the correct time code. Subtitles created from the same MDRP masters in ffWorks don’t have this issue – the length is normal, 45 minutes. Next I tried modifying the presets in Submerge (located at within the app package at Submerge.app/Contents/Resources/Presets but didn’t have any luck changing them enough to be able to create movie containers which weren’t three days long.
No luck, they all showed 11.59.59.45 as the movie length (is that one week or sixteen hours). It’s not a critical issue – the files do play back on our Sony X700 and our Pioneer BDP-450 blu-ray players – but I don’t like broken things so I set out to find out what the issue is.įirst I tried using some of the other Submerge presets to create my submasters with hard subtitles. The 1192 hour length makes it impossible to use the timeline to scrub (right away one is in blackness).
Screenshot of very long timecode-after-Submerge ffmpeg conversion.Ī 45 minute episode shows as 1192 hours long Unfortunately on the computer the container is broken and the video shows as being 1192:52:46 long. Kommissar Rex S01E02 with hard subtitles added in Submerge
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