Hey Patrick,

When rendering to .webm, kdenlive passes

    acodec=vorbis

to melt.

Here's an example

    $ /usr/bin/melt /tmp/saved.mlt in=0 out=63 -profile atsc_1080p_25 -consumer 
avformat:/home/kingsley/tmp/test.webm f=webm vcodec=libvpx acodec=vorbis crf=23 
vb=0 quality=good aq=6 max-intra-rate=1000 cpu-used=4 threads=1 real_time=-1

But, it crashes with a seg fault.

ffmpeg's audio codec documentation says to use
libvorbis[1].

libvorbis works for me.

    $ /usr/bin/melt /tmp/saved.mlt in=0 out=63 -profile atsc_1080p_25 -consumer 
avformat:/home/kingsley/tmp/test.webm f=webm vcodec=libvpx acodec=libvorbis 
crf=23 vb=0 quality=good aq=6 max-intra-rate=1000 cpu-used=4 threads=1 
real_time=-1

rendered OK.

Could kdenlive be passing a bad option to melt
(and ffmpeg/libav*)?

Thanks,
Kingsley

[1] FFmpeg Codecs Documentation
    https://ffmpeg.org/ffmpeg-codecs.html#libvorbis

-- 
Time is the fire in which we all burn.

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