Re: [FFmpeg-user] Quicktime Files create with -vtag aivx

- Original Message - > From: "Carl Eugen Hoyos" > To: ffmpeg-user@ffmpeg.org > Sent: Saturday, 6 December, 2014 01:38:27 > Subject: Re: [FFmpeg-user] Quicktime Files create with -vtag aivx > Rens Dijkshoorn offlinemedia.nl> writes: > > For autoselect the correct -vtag an extra > > con

Re: [FFmpeg-user] Default RGB to YUV conversion

Florian Friedrich ff.de> writes: > Which matrix is used by default to convert RGB > sources to YUV If this is really your question, please read the fine source. If your actual question is "I converted RGB sources with FFmpeg to YUV and the output did not look as I expected it, why?", please

Re: [FFmpeg-user] Quicktime Files create with -vtag aivx

Rens Dijkshoorn offlinemedia.nl> writes: > For autoselect the correct -vtag an extra > condition is needed in movenc.c Will you send a patch? Thank you, Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinf

Re: [FFmpeg-user] Quicktime Files create with -vtag aivx

> This Sony F55 camera can record in MPEG2, XAVC > and soon in PRORES & DNXHD. In frame sizes from > 1280x720, 1920x1080, 2048x1080, 3840x2160 & 4096x2160 > with frame rates up to 60 fps. > In addition to that it can record RAW formats > Currently i have only have media in 1920x1080, > 3840x216

Re: [FFmpeg-user] Delay between the first packet and last packed in the muxing queue

On Fri, Dec 5, 2014 at 12:20 AM, Matej Mailing wrote: > Hi, > > when muxing the screen capture with the live mp3 stream, it sometimes > happens that live mp3 stream becomes unavailable for a short moment > (due to routing issues etc.) and when this happens, the error > "http://mp3.rtvslo.si/val20

[FFmpeg-user] Default RGB to YUV conversion

Hi, after trying many different command lines and testing encodes, I'm questioning the (default) method of ffmpeg for converting RGB-sources to YUV. Which matrix is used by default to convert RGB sources to YUV (or YCbCr, more accurately) and how can it be influenced? Colormatrix-parameters seem

Re: [FFmpeg-user] dvd2concat error with loopback mounted ISO

Thanks for all the help. I built lsdvd 0.17 from sourceforge an now dvd2concat is working. However, ffmpeg seems not to like the syntax. I get a message unknown keyword 'stream'. ffmpeg -safe 0 -f concat -i file.concat . The output: ffmpeg version 1.2.6-7:1.2.6-1~trusty1 Copyright (c) 2000

Re: [FFmpeg-user] Mjpeg to h264 audio sync problem

Yes, audio is truncated in start. It seems it could be something like a muxing problem (issue 3859). Because when I convert MJPEG to AAC only, then the audio track is fine. Is it a bug, should I use any workaround? Thanks Peter > Date: Fri, 5 Dec 2014 10:57:13 + > From: blacktr...@gmx.net > T

[FFmpeg-user] multiple rtp stream recording

Hi, I'm trying to use ffmpeg for recording multiple RTP streams simultaneously on a single computer. It seems to me, however, that When I start to record of the second stream, incoming packets begin to mix with the first stream. I'm using DVBlast for the streaming, the problem occurs when streamin

Re: [FFmpeg-user] Mjpeg to h264 audio sync problem

* Petr Tresnak on Friday, December 05, 2014 at 10:34:50 + > the sound start is cut and audio is ahead even more with your command line. > > ffmpeg -i mjpeg.avi -qscale 2 -strict -2 -vcodec mpeg4 -acodec aac out.mp4 > > encoder : Lavf56.14.100 > Duration: 00:00:14.39, start: 0.092880,

Re: [FFmpeg-user] Use ffmpeg to convert stereo audio to mono

* Moritz Barsnick on Friday, December 05, 2014 at 10:37:14 +0100 >> Could we know how ffmpeg determine audio channel number from MP4 file? MP4 >> container indicates it's channel count is 2, but ffprobe shows mono as >> expected. > > ffprobe probably looks at the actual AAC stream? > > Here's a h

[FFmpeg-user] Choppy (hanging) video when writing C920 h264 to a file (no issues streaming)

I am completely baffled. I have a Logitech C920 which is capable of providing a hardware encoded h264 stream. If I capture video from it as described below, I can see properl smooth video on my laptop screen. But the resulting rec.mkv has a small ~0.5s freeze every ~2.5 secs. I uploaded the raw

Re: [FFmpeg-user] Mjpeg to h264 audio sync problem

Hi, the sound start is cut and audio is ahead even more with your command line. ffmpeg -i mjpeg.avi -qscale 2 -strict -2 -vcodec mpeg4 -acodec aac out.mp4 encoder : Lavf56.14.100 Duration: 00:00:14.39, start: 0.092880, bitrate: 873 kb/s Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp

[FFmpeg-user] stream Media Information using ffmpeg probe with custom-io

 Hello,I am developing an application that has two separate parts, one for reading of packets and other one for using packets.I am using Live555 to read incoming packets from source. and after getting packets I want to pocess it using ffmpeg.Now in order to set different information need to init

Re: [FFmpeg-user] Use ffmpeg to convert stereo audio to mono

> Could we know how ffmpeg determine audio channel number from MP4 file? MP4 > container indicates it's channel count is 2, but ffprobe shows mono as > expected. ffprobe probably looks at the actual AAC stream? Here's a hint: http://sourceforge.net/p/opencore-amr/mailman/message/31876733/ "The c