[FFmpeg-devel] [PATCH v2]libavfilter/asrc_atone.c : generate algorithmic music

[Paul B Mahol]

On 8/17/20, Ashutosh Pradhan <ashutoshp012345 at gmail.com> wrote:
> On Mon, Aug 17, 2020 at 4:37 PM Nicolas George <george at nsup.org> wrote:
>
>> Ashutosh Pradhan (12020-08-17):
>> > I have provided the sample for  $ ./ffplay -f lavfi -i atone
>> > in the folder
>> >
>> https://drive.google.com/drive/folders/1manne188m5T-7wWZb7ZJBLZasLmsX05i?usp=sharing
>>
>> Thank you. That was more helpful.
>>
>> Honestly, this is not "nice", it is just boring. Which is not your
>> fault: you could not hope to achieve in a summer what eludes years-long
>> PhD theses in musicology and artificial intelligence. The project was as
>> it is, and you seem to have more or less succeeded to implement it.
>> Variations of rhythm would have been nice, though.
>>
>> But the fact remains that this is of no practical use. It is of no use
>> to just listen to and enjoy, and since it uses an external library it is
>> of no use for testing. (This project seems to be based on an old
>> proposal of mine, with the goal to have a varied and somewhat realistic
>> source for audio testing. But testing requires we trust the source is
>> bit-exact.)
>>
>> Since you know the API best, could you say in a few words how hard it
>> would be to get rid of fluidsynth and use an internal synthesizer
>> instead?
>>
>> But in any case, your most urgent matter at hand is this:
>>
>> > > $ ./ffmpeg_g -lavfi atone /tmp/atone.ogg
>> ...
>> > > zsh: segmentation fault  ./ffmpeg_g -lavfi atone /tmp/atone.ogg
>>
> I am unable to understand the cause of this error. Are you using sdl2 as
> the audio driver?

That is encoding, but missed to post full uncut ffmpeg debug output
with backtrace.

>
>>
>> Because we definitely cannot accept a patch that segfaults like that.
>>
>> Regards,
>>
>> --
>>   Nicolas George
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