[FFmpeg-user] Converting to h.265, keeping all audio streams

[Henk D. Schoneveld]

On 09 Jan 2015, at 10:25, cvb at kruemel.org wrote:

>>> Sorry, I don't get the question. Does that sound a stupid idea?
>> If you want to compare then you should use the same, original source for
>> each encoder. As far as I can tell you're making your H.265 video from
>> your H.264 video which introduces another lossy generation and makes any
>> comparisons inherently flawed.
If the source is 1080 you could from that h264-source convert to 720 both with h264 and h265 and observe the differences
> 
> Yes, I understand that. Unfortunately, these are TV recordings which I only have in h.264, because they are broadcasted this way. So I guess the best I can do is to convert those into h.265 and see if I notice any drops in quality.
> 
> Is there, by the way, any option to see from an h.264 movie to see which settings (CRF, preset, etc.) were used originally to create it (e.g. by the TV station)?
> 
> Thanks again, Chris
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