Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-28 Thread Kieran O'Leary
Mr. Nice wrote: > How I can know FFV1 is version 1.3? Use the "-level 3" switch. More info here: https://trac.ffmpeg.org/wiki/Encode/FFV1 If you're feeling paranoid about whether your encode was lossless or not, run framemd5s of both files. More info here https://trac.ffmpeg.org/wiki/framemd5

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-28 Thread Moritz Barsnick
On Tue, Jul 28, 2015 at 15:28:33 +0100, MrNice wrote: > So 2 questions: > - What are the command options to add to get x264 lossless? > -preset fast -qp 0 , only/good? Well documented here, I believe: https://trac.ffmpeg.org/wiki/Encode/H.264#LosslessH.264 > - How I can know FFV1 is version 1.3?

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-28 Thread MrNice
On 27/07/15 11:54, Peter B. wrote: > On 07/25/2015 11:53 AM, MrNice wrote: >>> The standard approach to this kind of issue is to use (as close to) >> losslessly encoded intermediate files as possible. I.e. either use a >> codec designed for lossless encoding such as "HuffYUV", or use something >> l

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-27 Thread Peter B.
On 07/25/2015 11:53 AM, MrNice wrote: >> The standard approach to this kind of issue is to use (as close to) > losslessly encoded intermediate files as possible. I.e. either use a > codec designed for lossless encoding such as "HuffYUV", or use something > like x264 with "lossless" settings. > Why

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-25 Thread Michael Nolan
The application is a bit more complex than that. The source code is available on Github right now (https://github.com/Nolski/popcoder/ the ffmpeg commands reside in editor.py and the process of running all of the commands is in video.py) but since we are stitching together video, doing overlays, re

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-25 Thread Carl Eugen Hoyos
Francois Visagie gmail.com> writes: > I.e. either use a codec designed for lossless encoding > such as "HuffYUV", or use something like x264 with > "lossless" settings. FFv1 should be superior in (nearly) every regard, for example you would need several different x264 libraries to support al

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-25 Thread MrNice
On 25/07/15 09:54, Francois Visagie wrote: >> -Original Message- >> From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of >> Michael Nolan >> Sent: 25 July 2015 01:02 >> To: ffmpeg-user@ffmpeg.org >> Subject: [FFmpeg-user] Running multiple ffmpeg commands with minimal >> lo

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-25 Thread Francois Visagie
> -Original Message- > From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of > Moritz Barsnick > Sent: 25 July 2015 10:45 > To: FFmpeg user discussions > Subject: Re: [FFmpeg-user] Running multiple ffmpeg commands with > minimal loss in quality > &

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-25 Thread Francois Visagie
> -Original Message- > From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of > Michael Nolan > Sent: 25 July 2015 01:02 > To: ffmpeg-user@ffmpeg.org > Subject: [FFmpeg-user] Running multiple ffmpeg commands with minimal > loss in quality > > Hi everyone, > > I'm writing a

Re: [FFmpeg-user] Running multiple ffmpeg commands with minimal loss in quality

2015-07-25 Thread Moritz Barsnick
On Fri, Jul 24, 2015 at 16:02:22 -0700, Michael Nolan wrote: > do things like overlay, scale and trim videos, render text, render images, [...] > The biggest issue that I have is that the application that I run has to run > ffmpeg multiple times, thus re-encoding the video(s) and making the end > v