Hi, According to Microsoft's specs [1] (and after experiencing issues with the Unified Streaming Platform [2] server), content encoded with HE-AAC audio should use the AACH FourCC, but the value AACL is hardcoded in the manifest generation code. So I created the attached patch to fix this. It passes "test fate" and its effects can be seen using the commands bellow and compatible server.
Although I tried to follow the patch submission checklist don't hesitate to point errors or mistakes. Yann Sample command lines: ffmpeg -i video.mp4 -vn -acodec libfdk_aac -profile:a aac_low -ab 128k -ar 44.1k -movflags isml -f ismv http://example.com/ FourCC of audio track in manifest is AACL as before ffmpeg -i video.mp4 -vn -acodec libfdk_aac -profile:a aac_he -ab 64k -ar 44.1k -movflags isml -f ismv http://example.com/ FourCC is AACH ffmpeg -i video.mp4 -vn -acodec libfdk_aac -profile:a aac_he_v2 -ab 64k -ar 44.1k -movflags isml -f ismv http://example.com/ FourCC is AACP [1] https://msdn.microsoft.com/en-us/library/ff728116%28v=vs.95%29.aspx [2] http://www.unified-streaming.com/
0001-HE-AAC-correct-FourCC-in-ISML.patch
Description: Binary data
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