[FFmpeg-devel] [RFC]lavc/adpcm: Support baby monitor adpcm_ms

[Paul B Mahol]

On 5/3/16, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Paul B Mahol <onemda <at> gmail.com> writes:
>
>> On 5/3/16, Carl Eugen Hoyos <cehoyos <at> ag.or.at> wrote:
>> > Paul B Mahol <onemda <at> gmail.com> writes:
>> >
>> >> > I added the following comment locally:
>> >> > // Levana Ovia Baby Monitor prepends each audio
>> >> > frame with these two bytes
>> >>
>> >> Sorry, life sucks. This patch is unacceptable.
>> >
>> > So how should this be implemented?
>>
>> Perhaps predictor, if too big should be just clipped.
>
> Why do you think there is a too big predictor?
> Two additional bytes are inserted at the beginning of
> every frame.
> Should the demuxer be patched instead?

Why you think that? There is clearly overread if you ignore
first two bytes.
>
>> Without samples, there is not much one can do.
>
> Sample was part of this thread, is now in:
> https://samples.ffmpeg.org/asf-wmv/V_000038.asf
>
> Carl Eugen
>
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