[FFmpeg-devel] [PATCH 2/2] lavf: Add WebM DASH Manifest Muxer

Vignesh Venkatasubramanian vigneshv at google.com
Mon Jul 7 21:43:56 CEST 2014


On Mon, Jul 7, 2014 at 12:39 PM, Timothy Gu <timothygu99 at gmail.com> wrote:
> On Jul 7, 2014 9:38 AM, "Vignesh Venkatasubramanian" <vigneshv at google.com>
> wrote:
>>
>> On Mon, Jun 30, 2014 at 4:26 PM, Timothy Gu <timothygu99 at gmail.com> wrote:
>> > On Mon, Jun 30, 2014 at 3:44 PM, Vignesh Venkatasubramanian
>> > <vigneshv at google.com> wrote:
>> >
>
>> >> +#define OFFSET(x) offsetof(WebMDashMuxContext, x)
>> >> +static const AVOption options[] = {
>> >> +    { "adaptation_sets", "Adaptation sets. Syntax id=0,streams=0,1,2
> id=1 streams=3,4 and so on",
>> >> OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0,
> AV_OPT_FLAG_ENCODING_PARAM },
>> >
>> > I don't get the help message. Is it supposed to be:
>> > "id=0,streams=0,1,2 id=1,streams=3,4"
>> > or "id=0 streams=0,1,2 id=1 streams=3,4"?
>> >
>> > Also this needs an doc/muxers.texi update, preferably with some
>> > real-world examples.
>> >
>>
>> the purpose of this parameter is to combine streams into adaptation
>> sets with a unique id. so it would go like this: "id=1,streams=0,1,2
>> id=2,streams=3,4". This means that: streams 0, 1 and 2 belong to the
>> same adaptation set with the unique identifier 1; streams 3 and 4
>> belong to the same adaptation set with unique identifier 2. it is sort
>> of a parameter within a parameter. please let me know if it makes
>> sense now.
>
> That's what I thought, but you typed a space instead of a comma after id=1
> in the help message.

yes, i intended to use a comma so that each adaptation set's
parameters can be separated by a space. "id" and "streams" are two
parameters for an adaptation set and i have kept them together
separated by comma. if that does not make sense, then i can use space
to separate them and infer it as: any "streams" followed by an "id"
will belong to that "id".

>
>>
>> i will add some examples in doc/muxers.texi.
>
> Thanks.
>
> [...]
>
> Timothy
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-- 
Vignesh


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