user1950: In Quicktime pro you can turn off streams in movies, without deleting the stream. Is it possible to do this with a command line application like ffmpeg?
I have a bunch of video files that were recorded with both the crappy on-camera mic and a separate audio recorder. I've synched the sound and added it to the video, and now each clip has two audio streams. I want to keep the original audio, for reference and archival purposes but disable it. It's obviously done in metadata, but can it be done by ffmpeg?

user5569: QTCoffee let's you edit track information in QuickTime files, but it's OS X only and donationware:
$ modmovie -list clip.mov
Track list for clip.mov:
    * Video Track
    * Timecode Track
    * Sound Track
$ modmovie -disable "Sound Track" -save-in-place clip.mov

If you are on OS X, and if you have QuickTime Pro (included in the pro apps), I would rather use that and AppleScript.
For other platforms: libquicktime can also edit track properties through it's API, so you will need to write a command line wrapper first ...

1950: <p>In Quicktime pro you can turn off streams in movies, without deleting the stream. Is it possible to do this with a command line application like ffmpeg?</p>

<p>I have a bunch of video files that were recorded with both the crappy on-camera mic and a separate audio recorder. I've synched the sound and added it to the video, and now each clip has two audio streams. I want to keep the original audio, for reference and archival purposes but disable it. It's obviously done in metadata, but can it be done by ffmpeg?</p>
 5569: <p><a href="http://www.3am.pair.com/QTCoffee.html" rel="nofollow">QTCoffee</a> let's you edit track information in QuickTime files, but it's OS X only and donationware:</p>

<pre><code>$ modmovie -list clip.mov
Track list for clip.mov:
    * Video Track
    * Timecode Track
    * Sound Track
$ modmovie -disable "Sound Track" -save-in-place clip.mov
</code></pre>

<p>If you are on OS X, and if you have QuickTime Pro (included in the pro apps), I would rather use that and AppleScript.</p>

<p>For other platforms: <a href="http://libquicktime.sourceforge.net/" rel="nofollow">libquicktime</a> can also <a href="http://libquicktime.sourceforge.net/doc/apiref/group__atoms.html" rel="nofollow">edit track properties</a> through it's API, so you will need to write a command line wrapper first ...</p>
