Re: [Matplotlib-users] matplotlib FuncAnimation hanging issue

[Tony Yu <ts...@gm...>]

On Sat, May 11, 2013 at 7:08 PM, Colin McAuliffe <cj...@co...>wrote:

> To add to the previous email I've tried this with a few different backends
> with no luck. Have similar issues been found when creating videos with
> mencoder? If the final result is the same switching away from ffmpeg is
> fine.


Sorry for the delayed reply. I don't have mencoder on my system, but it's
probably worth a try. More comments below.

 Quoting Colin McAuliffe <cj...@co...>:
>
>>
>> The above error does not occur if I switch to agg.
>>
>> Also using the ffmpeg command
>>
>> ffmpeg -f image2 -i t%d.jpg video.avi
>>
>> on a few images gives the following output, where I put !! next to the
>> lines which are suppressed by including -loglevel quiet
>>
>> FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
>>   built on May  2 2013 23:13:41 with llvm_gcc 4.2.1 (Based on Apple
>> Inc. build 5658) (LLVM build 2336.9.00)
>>
>
<snip>

 !!Output #0, avi, to 'video.avi':
>> !!  Metadata:
>> !!    ISFT            : Lavf52.93.0
>> !!    Stream #0.0: Video: mpeg4, yuv420p, 4272x2848, q=2-31, 200 kb/s,
>> 25 tbn, 25 tbc
>> Stream mapping:
>>   Stream #0.0 -> #0.0
>> Press [q] to stop encoding
>> frame=    3 fps=  2 q=4.0 Lsize=     524kB time=0.12
>> bitrate=35781.7kbits/s
>> video:519kB audio:0kB global headers:0kB muxing overhead 1.083673%
>>
>
So the line starting with "frame=" doesn't get suppressed when you run with
`-loglevel quiet`? I actually thought those were the problematic lines
(since more of those get printed out for longer encoding tasks). Maybe this
is an issue with the ffmpeg version?

Unfortunately, I don't have much free time to reply in more depth.

Best,
-Tony