[Kdenlive-devel] custom ffmpeg parameters question

[Jan Uhlir]

Hi,
unfortunately, I had to report no visible effect :(

I reencoded all my test videos, I mean I reencoded all *outputs* from Kdenlive not the sources, through ffmpeg with suggested attribute, but problem remains. 

All the same:
all videos from Avidemux are played OK on any DVD player and PC (high quality, very smooth)
but everything I reencode through Kdenlive gives me the same flickering with fuzzy jumping edges playback in DVD player.
PC playback is bearable, lets say 'good', but not so smooth anyway.

I checked my testing video DVD on another DVD player, high quality Sony brand box this time - and the same result.
The clip from Avidemux is fine, those from Kdenlive are virtually unwatchable. So DVD player is out of suspiction.

I use QDVDAuthor for creating video DVD and K3B for burning. Both applications are out of suspicion too because of the same reason: The clip direcly from Avidemux is fine, those from Kdenlive are virtually unwatchable.

Just a notice:
Source video has around 7MB
Output video from Kdenlive has around 10 MB 
so there is like 30% increase in size. Isn't the bitrate quality in DVD export profile set too high?
Output video from Kdenlive reencoded again using ffmpeg -target dvd has around 10 MB too.

Avidemux uses ffmpeg or mencoder in background? Hmm, there could be some catch too.

I'm still not giving up. I try some experiments again. I try to compile Kdenlive & comp. from svn/cvs. I can try to put target=dvd directly to Kdenlive libavformat parameters in export profile. I will keep you informed.

Jan

>
>Hi,
>
>sorry, I suppose you'll do right, but just in case, I forgot to include
the
>input & ouptput file names in the command line. It should be:
>
>ffmpeg -i your_input_file_name -target dvd output_file_name
>
>Regards.
>Juan M.
>
>
>2007/3/13, Juan M <herrej01 at gmail.com>:
>>
>> Jan,
>>
>> I can not answer your question on how the "flags" parameter works in
the
>> custom export option, but try to help you with your "main" problem.
>>
>> If you do not have done so yet, please try to re-render your file using
>> ffmpeg in the command line as follow:
>>
>> ffmpeg -target dvd
>>
>> and tell if there's any improvement in the quality.
>>
>> I'm telling that because I had the same problem as you. The alternative
>> solution I found, without loosing too much quality was to export in
kdenlive
>> using MPEG high quality profile and then re-render as explained above.
In
>> this way I obtained a very good final product, at least as seen in my
TV !!!
>>
>>
>> I suppose (although not sure yet) that problems are related with the
>> parameters passed to ffmpeg by the different profiles and that's why
I've
>> proposed to re-design this option. Currently I'm testing different
profiles
>> and hope to come back with a proposal soon.
>>
>> Regards.
>> Juan M.
>>
>
>-------------------------------------------------------------------------
>Take Surveys. Earn Cash. Influence the Future of IT
>Join SourceForge.net's Techsay panel and you'll get the chance to share
your
>opinions on IT & business topics through brief surveys-and earn cash
>http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>_______________________________________________
>Kdenlive-devel mailing list
>Kdenlive-devel at lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
>
>