Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Michael Niedermayer	4abc411b97	nutenc: choose for non audio streams a timebase with finer resolution. While a 25 fps stream can in general store frame durations in 1/25 units, this is not true for the timestamps. For example a 25fps and a 25000/1001 fps stream when they are stored together might have a matching 0 timestamp point but when for example a chapter from this is cut the new start is no longer aligned. The issue gets MUCH worse when the streams are lower fps, like 1 or 2 fps. This commit thus makes the muxer choose a multiple of the framerate as timebase that is at least about 20 micro seconds precise Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	e3fb5bc147	nut: store and read the r_frame_rate With this, when we use a finer timebase than neccessary to store durations the demuxer still knows what the original timebase was. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	3a621c9d99	nutenc: Support writing an index The seek test improves in accuracy Fixes Ticket877 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Steven Robertson	82ecae8a70	lavfi: add alphaextract and alphamerge filters These filters are designed for storing and transmitting video sequences with alpha using higher-efficiency codecs such as x264 which don't natively support an alpha channel. 'alphaextract' takes an input stream with an alpha channel and returns a video containing just the alpha component as a grayscale value; 'alphamerge' takes an RGB or YUV stream and adds an alpha channel recovered from a second grayscale stream. Signed-off-by: Steven Robertson <steven@strobe.cc> Signed-off-by: Stefano Sabatini <stefasab@gmail.com>	13 years ago