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 >> loss in quality >> >> Hi everyone, >> >> I'm writing a video editor which will push out a large json file that >> includes the videos and a series of edits that were performed upon them. I >> have a python application which parses the json and runs ffmpeg commands >> to >> do things like overlay, scale and trim videos, render text, render images, >> etc. >> >> 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 >> video look much lower quality than the original content. The original >> videos are .webm and encoded using QTmuxingAppLibWebM-0.0.1. >> >> Is there any way that I can help prevent this sort of thing or is there any >> existing tooling for taking a series of edits and running them in one >> command (meaning I don't have to re-encode multiple times)? >> >> Any help would be appreciated. > > 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. > >>
Sorry to interfere, > > 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 do you add " " around lossless for x264. Is x264 still lossy even with "lossless" setting? BTW what is/are it/they? Thanks François _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
