When I converted a MKV movie file (1080p) at 3 MBPS, it worked. However, when I tried to convert the same file at 6 MBPS, the converted file cannot be opened with Quicktime or VLC player, although there was no error message from HandBrake. However, when I cancel encoding in the middle, the truncated file appears to be okay. So I am wondering if HandBrake has a problem to produce a large size of movie file.
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HandBrake: Problem converting MKV to mp4
- Thread starter ypn
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Which app do you suggest to convert audio track to AAC format with Apple CoreAudio, instead of ffmpeg?
Yes, if you are on a Mac and changing the container from mkv to mp4 for videos that already use the h.264 codec and for formatting the audio to be optimized for the aTV (AC3+AAC stereo), MP4Tools is a very good app.
Let me ask one more thing regarding MP4tools. Often, I watch movies on a Mac. When I play 5.1ch surround on a Mac, does it play only front L and R channels? If this is the case, I guess I should have mixed down 2 ch in addition to 5.1ch surround. Does MP4tools mixdown by Pro Logic II?
Your Mac has only 2 speakers I guess. So if you have 5.1 surround, it will downmix it to 2 channels, normally using contributions from all the 5.1 channels (L, R, C, LFE, Ls, Rs) (though LFE usually omitted).
Downmixes are typically normal Stereo, Dolby Pro Logic or Dolby Pro Logic II. Metadata in in your 5.1 surround file determines what downmix is performed by your decoder.
Don't know if MP4Tools downmixes to Pro Logic II, but depending on your surround source (DTS 5.1, or AC3 5.1), I recommend a pure stereo downmix and not some phaseshifting downmix. Those may produce steering artifacts.
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I am wondering if MP4tools uses Apple's Core Audio AAC encoder, which appears to be much better quality than ffmpeg encoder for mac. The log for MP4tools indicates ffmpeg but I do not understand if this means ffmpeg is used for audio encoding.
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I would suggest contacting the developer for that info: emmgunn@gmail.com
He has always been very responsive to my questions about his product.
He has always been very responsive to my questions about his product.
I got response that MP4tools uses ffmpeg. Unfortunately, HB appears to have no option for pass through video....
Is there any app to encode audio track with coreaudio aac?
Unfortunately, for audio conversion, Subler requires Perian which does not work on Mountain Lion.