[Ffmpeg-devel-irc] ffmpeg.log.20150322

[burek]

[00:12:59 CET] <haasn> I have files rose_0.png through rose_2.png that I want to stitch into a single movie, but ffmpeg -i rose_%d.y4m rose.y4m gives me rose_%d.y4m: No such file or directory. Huh?
[00:13:19 CET] <haasn> Sorry, rose_0.y4m through rose_2.y4m
[00:16:45 CET] <haasn> I tried renaming them rose0.y4m through rose2.y4m just to make sure, but I get the same result (rose%d.y4m: No such file or directory)
[00:17:03 CET] <c_14> That only works with image files, y4m is a video container
[00:17:12 CET] <c_14> use the concat demuxer
[00:19:14 CET] <haasn> Ah, that explains it. (Each of the y4m files had only a single frame anyway); I used a different source format
[00:25:49 CET] <c_14> hexagon5un: what command[s] ?
[00:27:19 CET] <smo_> hi
[00:27:52 CET] <smo_> what must i use as decoder/demuxer/parser to enable avi reading in ffmpeg build (in chromium src)
[00:27:56 CET] <smo_> ? please
[00:30:33 CET] <c_14> probably just the avi demuxer
[00:30:39 CET] <c_14> plus whatever decoders you want
[00:35:07 CET] <smo_> hello c_14 :)
[00:35:42 CET] <c_14> hello
[00:35:43 CET] <smo_> i m doinf some test lol
[00:35:46 CET] <smo_> doing
[00:35:48 CET] <smo_> '--enable-decoder=aac,h264,mp3,mpeg4,hevc,ac3,flac,dts,msmpeg4',
[00:35:49 CET] <smo_>       '--enable-demuxer=mp3,mov,avi,flv,flac,mp4,mpegvideo,dts,dtshd',
[00:35:49 CET] <smo_>       '--enable-parser=aac,h264,h263,mpegaudio,mpeg4video,ac3,dts,flac',
[00:35:56 CET] <smo_> totally wrong no ?
[00:36:07 CET] <smo_> hevc mp4 mkv ... works
[00:36:19 CET] <smo_> can t get dts (dca) working too
[00:36:22 CET] <BtbN> Those should all be enabled by default though
[00:36:47 CET] <smo_> it s in the chromium sources
[00:36:50 CET] <smo_> not classic ffmpeg
[00:36:58 CET] <smo_> or i think so ...
[00:37:21 CET] <smo_> by default it do not play mp3 hevc etc...
[00:37:30 CET] <smo_> hevc works fine with this for exemple
[00:42:28 CET] <smo_> possible to list available parsers in ffmpeg ?
[00:42:38 CET] <c_14> ./configure --list-parsers
[00:42:43 CET] <smo_> i have difficulties to make the differences
[02:29:00 CET] <smo_> c_14, avi now works after removing --disable-error-resilience ... don t know why but framerate is like slow it s not fluid what can do that ? (if you have an idear)
[02:29:17 CET] <smo_> all other codecs works very well
[02:29:26 CET] <c_14> No idea, sorry.
[02:29:37 CET] <smo_> np thanks :)
[04:43:29 CET] <crazy6> relaxed, surely you figured out solutions to all my problems?
[08:25:08 CET] <Rahul_> Hi all
[08:25:27 CET] <Rahul_> i want to stream my screen to another linux machine
[08:25:34 CET] <Rahul_> how can this be done using ffmpeg
[08:32:33 CET] <Rahul_> avconv -f x11grab -s 1600x900 -r 50 -vcodec mpeg2video -b:v 8000 -f mpegts udp://10.10.0.1:7894
[08:32:37 CET] <Rahul_> i am trying this
[08:33:08 CET] <Rahul_> but i am getting At least one input file must be specified
[08:33:12 CET] <Rahul_> please help
[08:38:56 CET] <Rahul_> is there any one??>
[08:55:45 CET] <Rahul_> is there any one
[08:56:02 CET] <Rahul_> please hellp me how to streeam Xscreen with another pc
[08:56:07 CET] <Rahul_> *linux pc
[09:33:36 CET] <temhawk> how do I create an animated gif made up of several animated gifs from different parts of a video arranged in a grid?
[09:34:29 CET] <temhawk> like those video screenshot previews, but with animated thumbnails instead of static images
[13:23:11 CET] <quellen-> http://quellen.altervista.org/0001.TS have you seen a .TS file before?
[13:24:03 CET] <JEEB> mpeg-2 systems, probably a Transport Stream :P
[13:24:56 CET] <quellen-> it's a PVR (DVBT Recorder)
[13:26:06 CET] <JEEB> if it doesn't work there's a high possibility that it's got not PMT. which is broken by definition. FFmpeg lately added some stuff to try and probe what's in the streams, but that led to actual correct files not working / getting misdetected, so I'm relatively herp derp about it still :P
[13:26:37 CET] <quellen-> it works
[13:27:05 CET] <quellen-> but sometimes it changes aspect:ratio
[13:27:18 CET] <JEEB> which is possible and quite often used
[13:27:28 CET] <JEEB> the streams contain information on that
[13:28:09 CET] <quellen-> ther is also the teletext (you can read it only on VLC)
[14:51:24 CET] <temhawk> how do I create an animated gif made up of several animated gifs from different parts of a video arranged in a grid? like those video screenshot previews, but with animated thumbnails instead of static images
[16:43:00 CET] Last message repeated 1 time(s).
[16:46:08 CET] <Anaphaxet0n> i have a TV that will playback content that is only of certain container and stream codecs combinations
[16:47:19 CET] <Anaphaxet0n> for example for .mkv i could use DTS core. core? how can i encode that? btw the movie i first tried has DTS sound
[16:55:34 CET] <justinX> yeah TV's often is quite limited. mine for example can't do the same formats in a mkv as it can in a mp4
[16:56:33 CET] <justinX> and then the trouble with subtitles... it seems to be extra picky about that it must be an linefeed after the last line in the latin1 coded sub that it want in a separate file
[16:56:42 CET] <Anaphaxet0n> same here
[16:57:01 CET] <Anaphaxet0n> is it a panasonic btw? :p
[16:58:13 CET] <justinX> nah it is an uh whats the name now... well it is produced by Vestel, the turkish tv manufacturer that produces most of the TV's in europe. (all with others name on them ofcourse)
[16:58:44 CET] <justinX> I bet some panasonics is made by vestel too :-D
[16:59:04 CET] <Anaphaxet0n> i ve seen more paranoid TVs. a Sony that after i diiscovered it needs an MBR partition scheme, and only one w95 LBA partition anf FAT32 then it wouldnt play anything. but at at least it showerd the files in the list
[16:59:45 CET] <Anaphaxet0n> mine is made in japan, so i suppose at least the exterior  is japanese
[16:59:54 CET] <Anaphaxet0n> dunno about the inside
[16:59:57 CET] <justinX> ok.. so if the usb disk had two partitions it woudn't work?
[17:00:17 CET] <Anaphaxet0n> no
[17:00:35 CET] <Anaphaxet0n> only that precise combo works on that tv
[17:00:41 CET] <justinX> perfect
[17:01:24 CET] <Anaphaxet0n> my tv sees a usb stick with 5 GPT partitions and shows only what is FAT32 and NTFS and sounds ok
[17:02:01 CET] <Anaphaxet0n> i wasnt expecting anything more from a windows CE driven TV
[17:02:02 CET] <justinX> a small script 'fix-up-for-tv' that checked a file that it was ok for my tv would be nice to have. that change container to mp4 if needed and extracts the subtitles if needed etc.
[17:02:42 CET] <Anaphaxet0n> but that Sony..... it runs linux! they just turned of the features
[17:02:49 CET] <justinX> :-D
[17:04:32 CET] <justinX> First I have to get a full, correct, spec of what the tv can do - then a script that uses ggprobe and ffmpeg should do the trick.
[17:05:37 CET] <justinX> +maybe something that make sure subtitles are enough ok for it I guess.
[17:06:35 CET] <justinX> We are spoiled by VLC that accepts just about anything I guess :-/
[17:27:02 CET] <Anaphaxet0n> that is very true
[17:27:31 CET] <Anaphaxet0n> and probably our TVs should all run something of their own using libvlc
[17:27:54 CET] <Anaphaxet0n> <justinX> First I have to get a full, correct, spec of what the tv can do - then a script that uses ggprobe and ffmpeg should do the trick     never thought about that
[17:30:04 CET] <justinX> yeah :)
[17:30:12 CET] <justinX> ffprobe I mean. my finger slipped.
[17:30:44 CET] Action: justinX should learn to look at what he is writing before pressing enter.
[21:06:53 CET] <afk> Hi everyone. I'm ripping BluRays using MakeMKV and now would like to encode just the Video using H264. The Audio and Subtitles don't need to be reencoded. Is there a chance to achieve this using FFmpeg?
[21:09:07 CET] <JEEB> yes
[21:09:18 CET] <JEEB> -c:a copy -c:s copy
[21:24:31 CET] <afk> JEEB, it seems that only the first audio- and subtitle-track is adapted
[21:24:38 CET] <c_14> -map 0
[21:24:39 CET] <JEEB> not first I think
[21:24:46 CET] <JEEB> it tries to look for the "best" tracks
[21:24:47 CET] <JEEB> but yes
[21:24:51 CET] <c_14> subtitle is first, audio depends
[21:25:06 CET] <JEEB> -map <number of input> , where if you only have one input file it's zero
[21:25:19 CET] <JEEB> which maps everything from that input
[21:25:33 CET] <JEEB> for example -map 0:a would select all audio streams from input 0
[21:25:50 CET] <JEEB> and -map 0:a:0 would be the first audio stream of the first input file
[21:26:50 CET] <afk> Okay thanks. I think -map 0 did the job :)
[21:35:13 CET] <caral> Hi, is it possible to capture under OSX only a part of the Screen? The wiki mentions how to capture the whole screen and to capture a smaller portion of it under Linux, but how can I do it under OSX?
[21:36:44 CET] <BtbN> crop the input
[21:37:28 CET] <caral> ah ok, that is an idea. thx Ill try that
[21:49:46 CET] <caral> But when I get it right, it means ffmpeg processes first the whole screen e.g. 1900x1200 and then crop some part of the Screen. Is there maybe a way where ffmpeg only record a specific position on the screen? The reason for that, maybe in the second way the cpu has much less todo.
[22:06:28 CET] <caral> cropping works. Thx. now the next parameters to lower the cpu usage ;-)
[22:16:51 CET] <gdoteof_> pleas ehelp me convert this codec: V_MS/VFW/FOURCC to anything else
[22:17:22 CET] <gdoteof_> using gucviewer i recorded uncompressed rgb video and ended up with an MKV file that i can't get ffmpeg to do antyhing with
[22:31:23 CET] <gdoteof_> codec: 24-bit RGB
[23:26:08 CET] <gdoteof_> [matroska,webm @ 0x1691480] Could not find codec parameters for stream 0 (Video: none (RGB  / 0x20424752), 1920x1080): unknown codec
[00:00:00 CET] --- Mon Mar 23 2015