h.264

The iPhone app I am working on captures images in series within certain user-defined time interval, I am looking for a way to combine these images into H264 encoded videos. I have done some research on Google, it looks like I will have to use something like ffmpeg/mencoder on iPhone? (Also found someone ported ffmpeg to iPhone, ffmpeg4iPhone) However, I found that x264 is under GPL license, and requires me to open source my project if I use ffmpeg. Also found some people suggested to use Ogg Theora, but I will need to port it to iPhone if I use it. (Which I am not sure how to do it now). Is

I have an h264 video file that is loaded into memory, and I attempt to play it with imem using the parameter "imem-cat=4" so that vlc will use an access module to demux the video, and vlc starts and receives my imem parameters successfully: [0x7f38a0000e28] access_imem demux debug: Using get(0x404e1d), release(0x404e91), data(0x7fff5b4a9430), cookie("IMEM") This category also means I don't have to provide DTS and PTS. The imem module for VLC isn't well documented, but I've found hints in several places e.g. https://forum.videolan.org/viewtopic.php?t=111917 https://forum.videolan.org/viewtopic

http://www.youtube.com/html5 indicates that Google Chrome is compliant with MediaSource Extensions & H.264. I make a simple test checking that my video is supported by Chromium, using the <video id='player' autoplay='true'> <source src='/test.mp4' type='video/mp4' /> </video> The video plays smoothly. A second alternative that also works fine consists in loading through AJAX the byte chain and converting the buffer to a URI object. Then asigning such URI to the (video) source.src attribute. Finally I try to load the same video through AJAX and inject it into a MediaSource Buffer. It fails with

I have been doing a lot of searching today for C# libraries which will allow me to create H.264 encoded video files. Does anyone know if any such libraries or 3rd party components exist? Use ffmpeg . I suggest to run a ffmpeg process directly, like in this sample: http://jasonjano.wordpress.com/2010/02/09/a-simple-c-wrapper-for-ffmpeg/ While the sample doesn't deal with the operation you need, I suggest to adapt it to your needs. ffmpeg-sharp is probably a good starting point. 来源： https://stackoverflow.com/questions/2509648/how-can-i-create-an-h-264-encoded-movie-from-a-set-of-images-in-c

I'm attempting to re-encode a h.264 mp4 file with a different bit rate using the Android MediaCodec API's introduced in 4.2. I am able decode and play the content (prior to changing the bit rate) using the MediaCodec API but if I attempt to re-encode the content with a different bit rate prior to decoding it I get garbled out put (a green screen with grey pixelation). The code I am using is based on the Android Test Case android.media.cts.DecoderTest Android Test Case android.media.cts.DecoderTest : public void encodeDecodeVideoFile(AssetFileDescriptor assetFileDescriptor) { int bitRate =

This question already has an answer here: How can I extract a good quality JPEG image from an H264 video file with ffmpeg? 1 answer I have a bunch of mov / H.264 files, that I'd like to encode into mov/MJPEG. However I'm getting very low quality output. Here's what I tried: ffmpeg -i a.mov -an -crf 11 -preset slower -pix_fmt yuv420p -vcodec mjpeg -f mov -y b.mov For H.264 encoding the -crf and -preset flags generate higher quality. But that doesn't seem to work for MJPEG. Use -q:v to control (M)JPEG quality The effective range is a linear scale of 2-31, and a lower value will result in a