#229 WavSource produces blank audio when seeking past 2 GB

[Joshua Holmer]

On 2.6.0 32-bit, create a script using WavSource to load a wav file greater than 2GB, then Trim the source at some point past the 2GB mark of the source. E.g.:

AudioDub(FFVideoSource("any_video.mkv"), WavSource("large_audio_file.wav"))
Trim(300000, 0)

The resultant output will contain a silent audio track. Attempting the same with FFAudioSource produces trimmed audio as expected.

Similarly, loading audio using WavSource as above (without Trim), previewing the AviSynth script in any media player, then seeking to any point past the 2GB mark of the audio file will produce silent audio. Seeking to a point before the 2GB mark then allowing the script to play past the 2GB mark will produce normal, working audio.

[Ian Brabham]

Restriction in the VFW infrastructure behind WavSource.

Use another Source to read huge files.