[Solved] Audio streams get incorrrectly detected as LPCM

[jj123]

Some MP4 videos are incorrectly getting their audio stream detected as lpcm, which then triggers an unnecessary transcode of the file.

I have tested this with 4.0.3 and 4.1.0

It appears to occur when a file has more than the usual 2 streams (1 video and 1 audio), some info from the log shows:

Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 720x404, 927 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 121 kb/s (default)
Stream #0:2(und): Data: none (mp4s / 0x7334706D), 0 kb/s (default)
Stream #0:3(und): Data: none (mp4s / 0x7334706D), 0 kb/s (default)

Audio codec "lpcm" failed to match support line f:mp4|m4v v:mp4|h264 a:aac m:video/mp4 n:2

When the file contains only the audio and video stream the audio stream is correctly detected as "aac"

I have also attached a Trace debug log from the latest 4.1.0, TestMovie1 exhibits the problem, TestMovie2 correctly detects audio as "aac".

[SubJunk]

This is fixed in 4.1.1 Thanks for the report!