[FFmpeg-user] [Bulk] Re: ProRes Quicktimes with audio not playing back reliably

[Bob Maple]

On 9/25/2012 1:42 AM, Tim Nicholson wrote:

> As I understand it ProRes is a variable bit rate codec, with the
> variable range quite constrained. I am wondering if the ffmpeg
> implementation is allowing too great a spread in this variable range,
> which in the case of simple material can go too low, and for complex
> material to high?

I don't know.. if I encode to a video-only file with ffmpeg, they play 
fine.  It's only when I do the audio as well that it fails.

Even if I take the video from ffmpeg and add the audio in Quicktime Pro 
myself, _that_ plays fine.. which is what suggested to me the muxing 
ffmpeg is doing was possibly at fault, and it's definitely drastically 
different based on poking around the files with ffprobe.

I've also tried all 3 ProRes encoders (prores, prores_anatoliy and 
prores_kostya) and get the same results.

I'm doubting ffmpeg is actually doing anything out of spec, but rather 
'out of the ordinary' such that Quicktime pukes on it... being the 
craptacular piece of software it is...


|  Bob Maple