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Old 30th June 2021, 23:28   #1  |  Link
Nexin
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Join Date: Dec 2007
Posts: 150
AAC_ACM v1.9 (fcchandler) Tag ID FF issue

MediaInfo

ID: 2
Format: AAC
Format / Info: Advanced Audio Codec
Format Profile: LC
Codec ID: 40


When passed through Virtualdub Direct Copy or with Save WAV

ID: 2
Format: AAC
Format / Info: Advanced Audio Codec
Format Profile: LC
Codec ID: FF

The audio Tag ID is changed. Tested with Virtualdub Final version and a few prevous versions.

Q. Is it the AAC ACM codec at fault or Virtualdub. Can it be fixed.

I was unable to test Direct Copy with Virtualdub2 as it seems to be hard coded to output as PCM encode.

Though with video Full Processing encode with Direct Audio AAC will pass through but then will also change the Tag ID to FF. The above is with using fcchandler Quicktime plugin to load mp4 h264 avc1 video.

Is it the AAC ACM codec at fault or is it maybe, the muxing code in Virtualdub itself that changes the AAC audio Tag ID to FF when it should remain always original and unmodified when not encoding the AAC audio.
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