[FFmpeg-user] Audio sync issues when transcoding Hauppauge HDPVR content

[Henk D. Schoneveld]

On Jan 15, 2013, at 10:20 PM, Scott Naef <snaef1 at mail.brookdalecc.edu> wrote:

> Carl,
> 
> Thank you for the help.  My sample source file input.mpg is at:
> https://drive.google.com/uc?id=0BzSQuUjfkFN1a191MG9acnFPc3M&export=download
> 
> My resulting output.mp4 is at:
> https://drive.google.com/?tab=oo&authuser=0#folders/0BzSQuUjfkFN1OWIyNEQyRndmWG8
> 
> My ffmpeg command is:
> ffmpeg  -i input.mpg -async 1 -y -vcodec libx264 -r 25 -b:v 1268k -s 512x368 -acodec libmp3lame -threads 2 output.mp4
Your source is 29.97 fps and your command line has -r 25 in it ??
> 
> Ouput log:
> https://docs.google.com/file/d/0BzSQuUjfkFN1N0VsLXVud2tsV0E/edit
> 
> 
> Tracy,
> 
> I tried your -vsync 1 option but it did not work wither.  I also tried -vsync 0 and interestingly this option produced a slew of PTS / DTS conflict errors ( log is at: https://docs.google.com/file/d/0BzSQuUjfkFN1U1FaME43RjdBYTQ/edit ) but that did not work either.
> 
> -Scott
> 
> 
> 
> 
> 
> On 1/15/2013 2:35 PM, Carl Eugen Hoyos wrote:
>> Scott Naef <snaef1 <at> mail.brookdalecc.edu> writes:
>> 
>>> I have tried several options in FFMPEG such as
>>> -async 1 but nothing I try seems to work.  I always
>>> end up with about 1.5 second delay in video from audio.
>> Please provide a sample that is long enough to
>> easily (!) see the desync.
>> 
>> And please provide the command line you tested
>> for transcoding (ideally for the sample you
>> provide) together with complete, uncut console
>> output.
>> 
>> Carl Eugen
>> 
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