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lisamelton / other_video_transcoding

Other tools to transcode videos.
MIT License
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Different audio types affect FPS #17

Closed asheimo closed 4 years ago

asheimo commented 4 years ago

I was working with the Fantastic Four and noticed the frame rate was pretty low so I ran some comparisons:

no options: ~1000fps --add-audio eng: ~500fps --main-audio 2: ~750fps --add-subtitle eng: ~1000fps --cuvid: ~600fps

information about the mkv file Audio 1 - A_AC3 eng Surround 5.1 Audio 2 - A_DTS eng Surround 5.1 Audio 3 - A_AC3 spa Stereo Audio 4 - A_AC3 eng Stereo Subtitle 1 - S_VOBSUB eng Subtitle 2 - S_VOSUB spa Subtitle 3 - S_VOSUB spa Subtitle 4 - S_TEXT/UTF8 eng

So my question is how is the audio affecting the fps so much differently depending on options? I get the --cuvid can cause things to be slower at times I saw that in the wiki, included in the testing for completeness. Oh, I'm running a GTX1060 3GB, i5-6600K.

lisamelton commented 4 years ago

@asheimo Good question! Your input is a DVD rip of "Fantastic Four (2005)", right? I suspect the answer is that the hardware video encoder is so fast that you're seeing slowdowns from copying four audio tracks (the --add-audio eng version) and transcoding that DTS track (the --main-audio 2 version).

lisamelton commented 4 years ago

@asheimo Is this still an open issue for you?

asheimo commented 4 years ago

In the context of other-transcode itself no, I'll close. I'll be persuing on my own out of curiosity and perhaps question the hive mind.