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Difference between AVCHD & Blu-Ray codec?
I would like to know exactly what differences exist between using template AVCHD 1920x1080i with 16,000,000 bit rate as compared to The Blu-Ray template 1920x1081i . The first template seems to include audio & the BLu-Ray one doesn’t.
I know that the Blu-ray template can be used with DVDA & have menu’s & chapters etc. Can anything be done with DVDA with the AVCHD files. Is there anything else that I should know?
Thanks in advance
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3 Replies
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[Paul Gregory] “I would like to know exactly what differences exist between using template AVCHD 1920x1080i with 16,000,000 bit rate as compared to The Blu-Ray template 1920x1081i . The first template seems to include audio & the BLu-Ray one doesn’t.”
The Blu-ray template creates Blu-ray compliant AVC video elementary stream files (i.e., .avc which is why there is no audio) while the AVCHD template creates MPEG-2 Transport Stream files (.m2ts) with AC-3 audio. The former is ready to be authored onto a Blu-ray disk while the later is not.
[Paul Gregory] “I know that the Blu-ray template can be used with DVDA & have menu’s & chapters etc. Can anything be done with DVDA with the AVCHD files. Is there anything else that I should know?”
If you drop the AVCHD files into DVD Architect it will re-encode the audio into a separate stream. This menas your audio will get encoded twice and reduce it’s quality. When authoring for Blu-ray or DVD you should always feed DVD Architect separate video and audio streams.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
[John Rofrano] ” When authoring for Blu-ray or DVD you should always feed DVD Architect separate video and audio streams.”
Is this the same as choosing ‘include audio’ and selecting ‘save as separate elementary streams’ in the render template? I end up with 2 files: m2v and m2a.
My system specs: Intel i7 970, 12GB RAM, ASUS P6T, Vegas Pro 11 (x32/x64), Windows 7 x64 Ultimate, Vegas Production Assistant 1.0, VASST Ultimate S Pro 4.1, Neat Video Pro 2.6
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[Nigel O'Neill] “Is this the same as choosing ‘include audio’ and selecting ‘save as separate elementary streams’ in the render template? I end up with 2 files: m2v and m2a.”
No. What that does is save the audio as MPEG2 audio. That is not a valid format for NTSC DVD’s although some players will still play it. It is a valid format for PAL however.
What to want is Digital Dolby AC-3 audio. It’s higher quality.
~jr
http://www.johnrofrano.com
http://www.vasst.com
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