Re: [FFmpeg-user] Warning "Starting new cluster due to timestamp" on muxing two input streams and resulting movie with muted audio at some locations

[Georgi D. Sotirov]

Hello,

Yes, it should be something like this, but I'm not able to reproduce the 
warning anymore, so I won't dig further unless it appears again.



Regards,

On 24.4.2017 at 14:12, Cley Faye wrote:

2017-04-24 11:22 GMT+02:00 Georgi D. Sotirov :


What is the general reason for warning "Starting new cluster due to
timestamp" to appear anyway?


​I'm not sure of the exact cause of this warning by ffmpeg, but if the
actual message is to be trusted (usually it is), it could be an
inconsistency in timestamps. Clusters are kind of an MKV "unit" that
contain the actual audio/video data (the frames). If there is a hole in the
timestamps, or if they are out of order, the muxer might create a new
cluster to accomodate this.​
​
​Since it only happen on the audio, you might want to check that the audio
stream itself is well formed, and also check the output file with some
other player (try ffplay)​
​
​. Other than that, a greater ffmpeg "guru" will have to step in ;)​
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Re: [FFmpeg-user] Memory usage growing when using ffmpeg. Is this expected?

[Cley Faye]

2017-04-28 16:52 GMT+02:00 Guilherme de Oliveira Costa <
guilherme.olive...@autotrac.com.br>:

> I am using ffmpeg record a video from a webcam, but the memory usage is
> very high, and keeps increasing with video length.
>
> For example, I use an embedded device with 64 MB of RAM, and when I
> recorded a 30 minute video, I was left with 2MB of RAM in the last minutes
> of the recording.
>

​I'm wondering, how do you check how much "free" memory you have while
ffmpeg is running? Since it didn't OOM or die, it might just have been
cache from the OS, which will gracefully yield if another program request
it.
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