[Libav-user] How to specify output format

[Paul B Mahol]

On 1/21/13, jim morgenstern <jmorgie at yahoo.com> wrote:
> So what Specifically is the specific format extension that I give to ffmpeg
> that gives me the "raw video format" you cited?

Headerless : .raw, .yuv (You need to remember pixel format and
dimensions stored in it)

With headers : .nut (You must use -vcodec rawvideo and -pix_fmt same
as your input video
                     to keep video uncompressed)
    There are others like .avi, .. but they may not support pixel
format of your input video.

>
>> -----Original Message-----
>> From: libav-user-bounces at ffmpeg.org
>> [mailto:libav-user-bounces at ffmpeg.org]
>> On Behalf Of Paul B Mahol
>> Sent: Monday, January 21, 2013 9:50 AM
>> To: This list is about using libavcodec, libavformat, libavutil,
> libavdevice and
>> libavfilter.
>> Subject: Re: [Libav-user] How to specify output format
>>
>> 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).
>> >> _______________________________________________
>> >> Libav-user mailing list
>> >> Libav-user at ffmpeg.org
>> >> http://ffmpeg.org/mailman/listinfo/libav-user
>> >
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>> >
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