[FFmpeg-user] Best settings for FFV1

[Dave Rice]

Hi,

> On Sep 14, 2015, at 11:56 PM, Etienne Desautels <etienne.desautels at gmail.com> wrote:
> 
> Hi,
> 
> I will start using FFV1 to archive video for a museum and I will like to know what's the best settings to get smaller files. I will use version 3 with checksums. From the few tests I did I found that those settings were the best for smaller files:
>    - coder 1
>    - context 0
>    - g 1

I believe using -g 1 would require more size than not. On the other hand this is usually one of the parameters for ffv1 I recommend the most as it increases the resilience of the file which is particularly relevant for archival use.

>    - slices 4
> 
> I really don't know what to think about context size. Somewhere else I saw that large context create smaller files. But in my tests that was the inverse.
> 
> I also tried 2 pass without any success. The final file were exactly the same size as the one created with 1 pass. And the log of the 2 pass was filled only with 0 except for the last number that was something like 843?

Can you show your process? Have you tried the directions according to the wiki? http://trac.ffmpeg.org/wiki/Encode/FFV1

If the file size is a bigger issue than the options used, you could examine the test suite results at http://download.das-werkstatt.com/pb/mthk/ffv1_stats/latest/ <http://download.das-werkstatt.com/pb/mthk/ffv1_stats/latest/>. The labels such as v3c01s4 document the version (3), coder (0), context (1), and slices (4).
Best Regards,
Dave Rice


> Any advices?
> 
> Regards,
> Etienne Desautels
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