Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have .dv files which I have recorded from DV tapes with iMovie. The formats are as follows:

Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s
Stream #0:2: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s

On my Mac, the files play just fine in QuickTime Player. But in VLC, while the video works fine, there are high pitched screeching noises, while the original audio can be faintly heard in the background. If I select "Audio -> Audio Channels -> Left" in the VLC menu, the sound problem disappears. I notice there are two stereo streams in the file, which seems odd.

Question 1. If this is a problem with my files and not VLC, is there any ffmpeg command I can run on the command line to repair the files?

Question 2. If this a VLC bug has to be fixed by the VLC developers, how many months can I expect to wait for a solution if I report it?

share|improve this question
Are you using the most recent VLC? Can you provide a small sample file? You can create a small file with dd (OS X has dd, right?): dd if=input.dv of=output.dv bs=1024 count=30000. – LordNeckbeard Nov 26 '12 at 22:04

Probably your recorder adds a timecode in second audio stream. You can either uncheck Audio -> Audio Track playback in vlc OR remove that stream with ffmpeg. Example is from question below.

ffmpeg -map 0:0 -map 0:1 -acodec copy -vcodec copy -i original.dv dv_without_2nd_track.dv

more about stripping audio ->

share|improve this answer
I doubt ffmpeg will allow 32000 Hz audio in DV. ffmpeg only supports 2ch/48kHz/PCM, although there are other variants in the DV specifications. Also, you're applying your options to the input (options before -i are input options) although ffmpeg can often assume you're wanting them to be applied to the output. – LordNeckbeard Nov 26 '12 at 18:23

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.