hvfvhigh, new ffmpeg, etc

Budge ajebay at errichel.co.uk
Thu Aug 25 07:32:05 PDT 2016

On 24/08/16 16:29, Alan Milewczyk wrote:
> On 24/08/16 10:50, RS wrote:
>>> From: RS Sent: Tuesday, August 23, 2016 22:39
>>> Unless and until HLS is fixed, FlashHD is the only way to get
>>> 1280x720 25fps unless you re-encode HVFHD to 25fps.
>> When I wrote the suggestion of re-encoding HVFHD to 25fps I was
>> assuming that I could use ffmpeg -r 25 to drop alternate frames to
>> reduce the frame rate.  It seems it is not that easy.  h.264
>> identifies the difference from the previous frame and encodes it. If I
>> delete the previous frame it stops working.  I just got a lot of
>> Invalid timestamp errors from ffmpeg.  It seems I have to uncompress
>> the HVFHD, which will result in an enormous file, and then re-encode
>> it at 25fps with libx264.  Does anyone have any ideas how to do it?
> I've no experience of doing this with video files but I know that the
> process is not recommended for audio files due to degradation of
> quality. Reluctantly I've decided to take the hit on hard drive space by
> accepting HFVHD @50 frames!

I am still playing catch up here trying to assess options and meanwhile 
have reverted to FlashHD.  Why is that no good for you if you need the 
drive space? I ask in case I have missed something.

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