[FFmpeg-user] Unable to find a suitable output format for 'libx264'

Antony Peiris acct_reg at fireslug.com
Tue Feb 19 19:48:38 CET 2013

Thank you so much for the help, truly appreciate it.

Actually, that filter was for scale, like so: -filter:v scale=640:-1

This command did not work, so I tired


as you had suggested to me in a previous thread (Need help encoding a specific video for HTML5)

This also failed. I am assuming I have just messed up the syntax/format... but I also tried this:


For future reference, could you please help me figure out exactly how to 
write this filter for scale? Thanks a million in advance!

On 20/02/2013 12:10 AM, Lou wrote:
> On Tue, 19 Feb 2013 23:37:46 +0530
> Antony Peiris <acct_reg at fireslug.com> wrote:
>> Running the following command, I get the following error...
>> ffmpeg -y -i test.mov -filter:v -c:v libx264 -preset:v slow -profile:v baseline -x264opts "level=3.0:vbv-maxrate=750:vbv-bufsize=3750:ref=1" -b:v 500k -r:v 25/1 -force_fps -movflags faststart -c:a aac -b:a 80k -pass 2 test_new.mp4
> You include "-filter:v", yet have no filter is named causing ffmpeg to
> assume that your output file is named "libx264".
> For future reference you will get an answer faster if you include the
> complete console output.
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