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michal
2014-01-12 10:35
developer
~0039191
Last edited: 2014-01-12 10:39
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Original channels option added in build 1687.
I am not sure about "Original" bitrate option, because bitrate is the main conversion setting and every format needs different bitrate to achieve "nearly the same" results.
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I'd consider video format the primary conversion setting, then any video conversion options like size/bitrate/framerate. Original Audio bitrate is important as it would allow the user to maintain the highest quality audio while converting videos. Some users may nearly need to change format and when doing that for multiple videos of differing qualities the Original option is important in all settings as this allows the user to get the best result for each conversion (without having to convert low quality videos to higher quality video/audio to match the higher quality videos being converted). |
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michal
2014-01-13 08:49
developer
~0039200
Last edited: 2014-01-13 08:53
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But the problem is, that the same bitrate does not always mean the same/best quality. It is dependent on the exact audio format. Samplerate and channel count are attributes of the original (uncompressed) audio stream, but the bitrate is parameter of the compression. 256kbps AC3 differs from 256kbps MP3, MP2, AAC or WMA. And what about variable bitrates...
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According to conversation with Jiri, we will implement this in the future version, but we have to add some control mechanism too, to avoid generation of nonsense bitrates, e.g. during conversion of PCM audio stream (with very high bitrate, some cameras create such videos) to MP3 etc. |
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