Vovsoft Giveaway
Vov Screen Recorder

seems it's "system audio" capture method that was causing the audio/video sync issue, capturing via the hardware realtek stereo mixer input using another instance of FFMPEG.EXE to capture it remained in sync but using the alternate audio capture of "system audio" which I presume captures the audio using the main executable does not appear to retain sync with FFMPEG.EXE captured video. I await future versions to see what improves.

Trying to debug this... I'm using the portable build under Win10 latest feature set and properly patched. The program fails to record Audio from the microphone Array in the laptop, no idea if it's the API or the sample depth and rate it's balking at as there are no settings for Audio capture for each device within the program so one assumes it uses the record settings from Sounds applet. It also drops mp4 video files into the programs folder and keeps them there if the entire creation reconstruction of the video track and sound track does not succeed which creates a mess the end user has to clean up.. Also on every launch it goes through a lengthy initialization process of bench marking the various h264 and h265 hardware acceleration options available before handing the user interface back to the end user... If such a process IS really required the results should be stored in Settings.ini and it never repeated again unless the settings.ini is deleted OR it is moved to different hardware, since it is sort of portable even if the license is not. had a bit more success with capturing to MKV but the sound track was seconds delayed from the video on screen activity and had to give it permission to write to the Videos folder due to controlled folder access controls which is not an issue. But the not tidying up on audio capture failure or merge capture failure and the retesting of hardware acceleration on every launch and audio being seconds out of sync with the video are issues that need to be addressed, other FFMPEG capture GUI's don't seem to have these issues and also offer simultaneous webcam picture in picture and simultaneous system sounds and microphone capture. good try but really needs more work before it's a release candidate let alone a stable commercial release IMHO.

Any reason you built this as a 64bit main executable and 32bit FFMPEG.EXE where it's FFMPEG.EXE screen capture routines you use? Have you tried building it 32bit and it consumed greater than 32bit user process limit of 2GB? Or was the decision an arbitrary one for no particular reason? Also Why oh Why default to dumping captured VIDEO files onto the users Desktop instead of defaulting to somewhere normal like the Users Videos folder? would not force the end user to have to alter the default settings to avoid polluting their desktop with data files!