On Sun, Dec 04, 2016 at 10:00:24AM +0100, Carl Eugen Hoyos wrote: > 2016-12-04 5:15 GMT+01:00 Toerless Eckert <[email protected]>: > > I am trying to encode TV recordings into the "best" container format, > > where "best" means that the video has changing aspect ratio, eg: > > some segments 16:3 then 4:3, then back to 16:9. > > Then simply keep your ts recordings, they are for sure the "best" > recordings by all means.
> > TS plays back correctly with all players - ffplay, kodi, vlic, mplayer, > > but TS has aout 10% overhead over all the other containers in > > my experience. > > Of course, it is meant for lossy transmission. hmm.. Is it really redundancy or just the ability to quickly sync to a channel after channel changing in a broadcast system ? How about a nerd knob in ffmpeg "encode TS with any form of redundancy redundancy minimized. Aka: drop from encoding anything that could also drop in transmission without visual experience loss. > (TS and MPEG2 TS are the same.) > This seems to imply that you know of other formats supporting > aspect change that are not supported by FFmpeg. No, just PS/TS/AVI and i've tried to figure out if mp4/mkv support it, and the seeming asnwer is "no". > > Only mplayer can correctly play back aspect changes with AVI, > > kodi, ffplay, vlc all just play back with the initial aspect ratio. > > The reason may be that aspect ratio change in avi is not well > specified. Yeah.... how do i compare a badly documented Microsoft format that does support what i want with a probably much better specified open source format (matroska) that seemingly does not do what i want ;-)) > > The PS files created with "-f vob" or "-f dvd" in ffmpeg have about > > the same size as avi and are correctly played back with AR changes > > by ffplay, vlc, kodi. The versions of mplayer i tried only plays back > > mpeg2 video in PS, not h264. Alas, i have some important apps that > > leverage mplayer. > > This should work with -demuxer lavf but it seems that the usual h264 > timestamp problem hits us. http://grouper.ieee.org/groups/1722/contributions/2015/IEEE1722_H264_Timestamps.pdf ? > > - how "standards" compliant is it actually to encode h264 into vob/PS > > files. As in: i'd feel a lot safer if i'd know that my encoding > > was standard compliant and mplayer has a bug than if mplayer is > > right, and all the other players are just very forgiving. > > After all, h264 seems to only exist in Blu Ray and those seem to > > use TS, not PS... > > This question makes no sense imo (you already forgot dvdhd) but ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > in any case, keep your recordings. Sorry, trying to parse. was my question confusingly written ? Forget standards: companies that build media players will make them try to play back whatever the feel is sufficiently often used that enough customers would want to use it. I am not aware that any commercial media creates h264 inside MPEG-2 PS as their file format. If DVD-HD was doing that, that would be interesting, but alas not very relevant today. Cheers Toerless > > Carl Eugen > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". -- --- [email protected] _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
