[Libav-user] Q regarding ffmpeg command to change bit rate of wmv file

[Matthew Einhorn]

Running "ffmpeg -formats" list all the codecs that ffmpeg can
decode/encode. If you look at vc1 you'll see that ffmpeg can only
decode it not encode it. So you cannot save a file in vc1 format (I
think). You'll have to select a different output format.

Matt

On Wed, Aug 3, 2011 at 2:33 PM, disha mishra <disha.mishra at gmail.com> wrote:
> Yes I tried  -vcodec copy but that doesn't work.
>
> Thanks,
>
> On Wed, Aug 3, 2011 at 10:49 AM, Matthew Einhorn <moiein2000 at gmail.com>
> wrote:
>>
>> On Wed, Aug 3, 2011 at 1:35 PM, disha mishra <disha.mishra at gmail.com>
>> wrote:
>> > Hi
>> > I have a VC-1 file at Simple profile, medium level, bit rate = 236 kbps.
>> > I
>> > use the following command to change bit rate and frame rate of file
>> >
>> > ffmpeg -i input.wmv -b 128k -r 15 output.wmv
>> >
>> > When I check the information of output file, it shows a file with MPEG-4
>> > Visual format and codec MP43. Is there any way to produce an output file
>> > with the  same VC1 Simple profile, medium level information as input
>> > file
>> > using ffmpeg?
>> >
>> > I tried using -f vc1 switch in the command but thats only for having raw
>> > vc1
>> > video output.
>> >
>> > Thanks,
>> >
>>
>> Have you tried -vcodec copy? It's in the ffmpeg documentation.
>>
>> Matt
>> >
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>> >
>> >
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>
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