[vlc-devel] Dropped frames despite ample CPU idle time?

[Finn Hughes]

That's some fast reply ;)

If I disable the subtitles or switch to yadif deinterlacing I do not 
drop frames which AFAIK may discount:
"It could be that the decoder outputs corrupt timestamps, or the 
packetizer, or the demuxer, or the source media."

If so I guess that leaves
1. excessive jitter
2. video output renders too slowly
3. input synchronization or decoder code

Although maybe 3 is also unlikely based on the above?

An additional note is that frames are only being dropped when the 
subtitles are being updated, which to my mind makes 1. the likeliest 
option, is there an obvious way to try to isolate the problem area?

Finn

On 12/06/13 16:41, Rémi Denis-Courmont wrote:
> On Wed, 12 Jun 2013 16:38:10 +0100, Finn Hughes <finn.hughes1 at gmail.com>
> wrote:
>> I'm not familiar enough with the vlc chain to know what's going on, the
>> decoder isn't reporting dumping any frames so I assume all frames are
>> being decoded and it's just that there is too much jitter in the
>> "decode" chain?
>
> It could be excessive jitter as the synchronization no longer seem to
> strictly obey the caching setting. It could be that the decoder outputs
> corrupt timestamps, or the packetizer, or the demuxer, or the source media.
> It could be that the video output renders too slowly. It could be a bug in
> the input synchronization or decoder code.
>