MYCOMETG3  Please Read document.

Workaround for MPEG Streamclip issue is also included.  
(Version 0.8)

MYCOMETG3  I have confirmed Toast 8.0.3 now compatible with mp4vDecoder.

And, avc1Decoder also does not have any issue with Toast 8.0.3. Please Update if you can.  
(Version 0.7r2)

MYCOMETG3  I have confirmed Toast 8.0.3 now runs properly with mp4vDecoder. Obviously, it was NOT mp4vDecoder issue.  
(Version 0.7r2)

MYCOMETG3  Please check README-Tips.rtf (included document)

* Quality slider corresponds to ffmpeg -qmin. Center is QP=24, Best is QP=14, Least is QP=34.

* On Constant Rate Factor-CRF Mode, the slider corresponds to ffmpeg -crf. Center is crf=24, Best is crf =14, Least is crf =34.

I guess these range are enough for common use. Additionally, qmax is always 51 (same as x264 default).

//

* By default, partitions are I4x4, I8x8, P8x8, B8x8. (Same as x264 default)

Also you can check partp4x4, which means ALL partitions type.  
(Version 0.7r2)

MYCOMETG3  avc1Decoder may decode AVCHD movies, but I am not sure if it works on every file.  
(Version 0.7r2)

MYCOMETG3  No need to remove others.  
(Version 0.7r2)

MYCOMETG3  Either will do.  
(Version 0.7r2)

MYCOMETG3  avc1Decoder 0.6.7 is safe.

Some apps like Toast and mp4vDecoder has some compatibility issue same as Perian 1.0.  
(Version 0.6.7)

MYCOMETG3  Try remove DivXdecoder.component, and check if it helps.  
(Version 0.6.7)

MYCOMETG3  avc1Decoder runs on H.264 media only under mov and mp4 file. It also has postprocessing filter and color adjustment feature.

Perian runs many media type, but does not have postprocessing filter nor color adjustment.

You can install both.  
(Version 0.6.6)

MYCOMETG3  MPEG-4 AVC does not include MPEG-4 ASP/SP.

AVC is called as "H.264". ASP or SP are generally called as "MPEG-4".

avc1Decoder just handles H.264 media only.

mp4vDecoder handles ASP/SP media only.  
(Version 0.6.6)

MYCOMETG3  I have tried a few HD trailers. Everything works fine.

Would you please tell me that URL?  
(Version 0.6.5)

MYCOMETG3  Hi, would you please show me the URL?

I have tried at , and they are all available under avc1Decoder.  
(Version 0.6.5)