[FFmpeg-trac] #6424(avfilter:new): endless loop in avfilter.c
FFmpeg
trac at avcodec.org
Thu Jun 1 16:55:54 EEST 2017
#6424: endless loop in avfilter.c
-------------------------------------+-------------------------------------
Reporter: tinybug | Owner:
Type: defect | Status: new
Priority: important | Component: avfilter
Version: git-master | Resolution:
Keywords: deadlock | Blocked By:
regression | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by tinybug):
Replying to [comment:3 Cigaes]:
> This is a bug in amix:
>
> {{{
> /* unclosed input with not enough samples */
> return 0;
> }}}
>
> Returning 0 without filtering samples is not acceptable. Fixing it with
{{{AVERROR(EAGAIN)}}} allows to make some progress, but freezes later.
>
> I will try to look into it if time permit, but I consider amix to be
mostly unsupported.
I will simplify the command line next time, thanks your advice. In this
command, if I remove the fps filter before overlay, just like this:
{{{
ffmpeg -ss 9 -t 3 -i 7bed448f-b835-44d0-8838-70bd5a98f116.mp4 -ss 0 -t 3
-i fbb7460b-233a-48a9-8e19-beb37a5297fe.mp4 -y -filter_complex
"[1:v][0:v]overlay=x=50:y=50[overlay];[0:a]afade=type=out:ss=0:d=3[afade100];[1:a]afade=type=in:ss=0:d=3[afade101];[afade100][afade101]amix=inputs=2:duration=shortest[amix10];[overlay][amix10]concat=n=1:a=1:v=1:unsafe=1[v][a]"
-map [v] -map [a] -vcodec libx264 -pix_fmt yuv420p -r 25 -profile:v main
-level 3.1 -acodec aac tmp.mp4
}}}
It will run perfectly. But i just wanna make all input videos to the same
fps before filtering. The source codes of filter graph is too complicated
for me, I have a hard time to debug it, but make no sense. Really
appreciate and thanks for your work.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6424#comment:4>
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