[Libav-user] How to specify output format

[Paul B Mahol]

On 1/21/13, jim morgenstern <jmorgie at yahoo.com> wrote:
>>> where can I find the list of formats and their extensions?
>> In the source code
>
> Yes but the source code is hundreds of files;  can you tell me which one
> has
> the list and the mapping?
>
>
>> > .       What is your recommended format for uncompressed HD video ?
>>
>> libx264 is the state of the art encode
>
> But I do not want any encoding or compression:  I want flat file that can
> be
> read later on for more processing.  So is there a recommendation for a
> particular file format that does this?

Depends on what you gonna use for more processing later.
Depending on available storage and CPU speed you could use raw video formats...

>
>
>
>
>> -----Original Message-----
>> From: libav-user-bounces at ffmpeg.org
>> [mailto:libav-user-bounces at ffmpeg.org]
>> On Behalf Of Stefano Sabatini
>> Sent: Monday, January 21, 2013 7:50 AM
>> To: This list is about using libavcodec, libavformat, libavutil,
> libavdevice and
>> libavfilter.
>> Subject: Re: [Libav-user] How to specify output format
>>
>> In data Saturday 2013-01-19 01:55:22 -0500, Jim Morgenstern ha scritto:
>> > I have C++ app [win 7]  that is reading and writing video/audio stream.
>> >
>> >
>> >
>> > When I specify the output file as xxxx.MOV I am getting H264
>> > compressed video at 24 fps.
>> >
>> >
>> >
>> > I want to have output as uncompressed at 30 or 60 fps according to the
>> > input.
>> >
>> >
>> >
>> > Some simple [I hope] questions:
>> >
>> > .       What is [where can I find] the mapping between file name
> extension
>> > and format used?
>>
>> In the source code, or you can show the ".extensions" field for all the
> registered
>> AVInput/OutputFormats.
>>
>> >
>> > .       Can I specify the output format I want rather than using
>> > av_guess_format ?  all the tutorials use guess
>>
>> Yes, you need to specify avformat_alloc_output_context2() and rely on
>> oformat/format_name parameters, or use av_guess_format().
>>
>> >
>> > .       What is your recommended format for uncompressed HD video ?
>>
>> libx264 is the state of the art encoder (but it has licensing
> constraints).
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>
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