[Cin] Audio out of sync when rendering MP4s

[Igor BEGHETTO]

Could you try this render type, please?
Change the compression "vp9_1280x720_24or25or30fps.webm" to your format 
size (1920x1080?)


/* ************************** */
Render_WEBM:
   - Filename: yourfile_render.webm

   - File Format: FFMPEG - webm
   - Audio:
       - Preset: webm.webm
       - Bitrate: 128000 (128k)
       - Quality: -1
       - Samples: fltp
   - Video:
       - Compression: vp9_1280x720_24or25or30fps.webm
       - Bitrate: 0
       - Quality: -1
       - Pixels: yuv420p
       - Video Options ( * means changed by me):
           # 20171119-2100
           # based on https://developers.google.com/media/vp9/settings/vod/
           # for explanations reference the Cinelerra Manual
           # 1280x720 (24, 25 or 30 frames per second)
           b=1024k
           minrate=512k
           maxrate=1485k
           tile-columns=2
           g=120 (*)
           threads=8
           quality=good
           crf=32
           speed=4
           color_primaries=bt709 (*)
           color_range=jpeg (*)
           color_trc=bt709 (*)
           colorspace=bt709 (*)
/* ************************** */