Create Stop Motion Animations on Linux with Entangle and avconv • Dototot You are using an outdated browser. It supports all of audio as well as video formats via libavcodec and libavformat, meaning that VLC can play back H.264 or MPEG-4 Part 2 video and support FLV or MXF file formats via FFmpeg’s libraries. The best thing in VLC is that it can manage to play some of incomplete or unfinished files. When you compress video for on-demand streaming, you primarily care about three things; quality, quality and… let’s see, oh yes, quality.
In contrast, the Apple codec lacks critical features like support for the High profile or CABAC entropy coding, and produces much lower quality than x264, though the difference is most noticeable at aggressive encoding parameters. Of course, the quality differential will vary according to the source content and the encoding parameters that you use. When you click the download link on MyCometG3, you’ll download a DMG file that you can double-click to open.
To use the x264Encoder within Compressor, you can change the codec in an existing preset or create a new preset; I’ll show the latter technique. Briefly, the developers of x264 created the ten presets shown in Figure 6 to enable x264 users to simply and easily balance encoding time against quality.
I produced the file comparisons shown in Figures 1 and 2 using Medium preset, which is the default preset, and one that I find represents the best balance of encoding speed and quality. As an example, if you encode using the Slower preset, the encoder uses 8 reference frames. In addition to choosing a preset, you can also choose an x264 tuning option as shown in Figure 7. In general, if your video falls in one of the first three categories, or is a Touhou game, you should apply the fine-tuning option. Once you choose your preset and tuning option, click OK to close that dialog and return to the Libavcodec settings screen shown in Figure 5 (and again in Figure 8, below, for convenience.
Any time you change codecs or encoding parameters, there’s a potential compatibility risk. Note that potential incompatibilities are most likely on devices that have the least tolerance for out-of-spec video encoding. Hi Jan,I have to say that Handbrake has become one of my favorite encoders recently; it has the latest x264 implementation and comes with handy tool-tips in the Advanced settings tab. If you’re not familiar with Java JNI, you may need to read about JNI first in order to understand the code. It has been long time since I wrote here and I really wanted to do again ?? … but lately my life has had many changes.
Initially it’s normal that you found a bit disconcert some of the names of the used structures.
In the former case, the variable nb_streams store the number of streams (AVStream) existing in the file of stream we are reading.
There are countless more fields and flags to set in order to enable some features, but these parameters depend on the specific codec you choose and the type of compression you want to configure. In the first we search the appropriate AVOutputFormat by means of the function guess_format. It’s important to highlight that path could be both a output file name where streams will be saved or a TCP or UDP location where data will be streamed.
There isn’t much to say here, I only want to highlight that depending on the selected codec we will be able to setup certain parameters or not. As you can appreciate this section is very similar to the previous one, but there is a peculiarity.
In line 4 we must call this function although we don’t have parameters to set (NULL).
The application receiving or reading information and decoding it is too much straightforward. The function in the first line is obligatory but we can have problems with the function av_find_stream_info appearing in the second line.
In the first line we capture the pointer to the AVCodecContext structure in order to use their fields easily.
In the data stream we also need to specify the field time_base is case of we didn’t use the function av_find_stream_info. Firstly we try to tread a packet and then we check from what stream it comes (video or data). As I mentioned at the beginning there is very little documentation and code samples related to this library and to be able to do certain things in your firsts days of novice with the library could become a hell.
Only works reliably on some very fast Android devices, please try before you buy specifically for this format.
Commonly known as VLC, it supports various audio and Video compression methods and file formats such DV-Video, video CD and streaming protocols.


It is free software, ignoring DVD region coding on RPC-1, making it a region-free media player. It is full offline installer ISO of latest version for 32 bit 64 bit windows with direct download link.
If you’re been encoding H.264 video with Apple Compressor using the codec that Apple provides, you definitely haven’t been optimizing the quality of your video.
For example, Figure 1 shows how the x264 codec compares to Apple’s when encoding my standard 720p test file to 800kbps. Figure 2 shows a similar comparison when encoding an SD file to 640?480 resolution at 468kbps. For example, Apple encodes some of the marketing videos shown on its website at 848?480 resolution with a video data rate of 1.9Mbps, which is quite high. Note that Mochizuki discontinued additional development on the component at the end of 2011, so the code is frozen as of that date.
As far as I know, this is the most advanced x264-based implementation available that you can operate in Compressor. In Compressor’s Settings window, click the Create a New Setting list box and choose QuickTime Movie, which opens a new setting in the Inspector window. While the settings are very comprehensive, there are only one or two that you need to adjust, which I’ll come back to in a moment. You’ll see the same presets whether you access x264 via plug-ins like x264Encoder, free programs like Handbreak, or professional encoding tools that offer x264 encoding like Sorenson Squeeze or Telestream Episode. Note that if you choose slower presets you increase the risk of creating files that may not play on your target platforms. If you scan through the readme file included with the x264Encoder download, you’ll note that files with over 6 reference frames may not play in older versions of QuickTime. Here’s where you can customize one or two specific parameters for your target playback platforms.
In general, you can configure these and all other Compressor settings as you have in the past.
Remember, however, that since YouTube, Zencoder, Sorenson, Telestream, and many other companies use the x264 codec, there’s nothing inherently wrong with the codec; if there is a problem, it almost certainly relates to your settings. For an amateur compressionist who has to do encodes at work such as myself , it's a great way to learn the different parameters of x264. The app will detect the input video file’s resolution and codec information through interface provided by FFmpeg. Note that the code below is not completed, you can download the entire code at the end of the post. The code below is extracted from the app source code, which is provided for download at the end of this tutorial. Using the function guess_format we can specify the muxer to use and it will returns us a pointer to a AVOutputFormat with appropriate values. Furthermore, error checking statements are not shown to make the code clearer, but you must carry out checks on all functions that can return some kind of error!
In this function we can directly specify the muxer to use in the first argument or to use the second one with the file path and the function try to determine the muxer looking in to file the extension. If we fix the parameters incorrectly the application likely will fail when it tries to open the codec or encode some data. If we are going to read several images and we know previously that all of them have the same format we can avoid to call these firsts 7 lines the following times. The module libswscale let us to create converters in order to convert images from their original format to other desired one simply calling one function. The function av_open_input_file calculates some parameters of the AVFormatContext structure such as the number of streams, its type and the codecs used in each stream. In this library we found most of existing codecs implemented and it have been in evolving since several years so it is a robust software. I you know a little of English the best you can do is to ask directly on the project mailing list of the projects libav and ffmpeg y wait to some kind soul gives you a hand.
VLC Media Player for 32 64 bit contains some filters which can rotate, distort, split, mirror, and deinterlace videos.
You can install and run VLC directly by using a USB flash drive or any other external drive.
In this tutorial, you’ll learn how to install and use the x264 codec within Apple Compressor, which will improve the quality of your encoded video, particularly at lower data rates.
Significantly, x264 is an open source and free option that’s been rated as the highest quality H.264 codec for the last few years in the highly-regarded codec comparison published annually by Moscow University.
To be clear, I produced both in Compressor, the file on the right using the Apple codec and the file on the left using the x264 codec.
Again, in this high motion shot the Apple codec looks faded and preserves much less detail.


This means that as the x264 development community advances the codec further, you won’t get the benefits of these advances.
I used this update to encode the x264 files shown in the figures above, so obviously this component produces much higher quality than the Apple codec. As with these tools, when you choose a preset, the x264Encoder applies a certain set of parameters which you can later customize. To avoid potential problems like these, it’s best to use the Medium preset unless you’re certain that you can correct any potential problems before encoding.
For example, if encoding for older mobile devices, you should limit the H.264 profile to the Baseline profile.
You can minimize the impact of any incompatibility by testing the first few files that you encode on all relevant target platforms. In most of case each of these stream will have a codec associated in order to be able to decode the data received through this stream. In line 8 we read a packet from AVFormatContext containing the input image and in line 10 we decode this image. Once the image is converted to the format specified in the video encoder we compress this image using the encoder. However, it doesn’t provide some interesting values about the streams like the frame rate, width or height of images, etc. I repeat again that we set these parameters for the problem commented previously with the function av_find_stream_info. We can found also several network protocols implemented (TCP, UDP, RTP, STRP, etc.) so it can be used for a wide range of applications. Of course, you can also ask me if you don’t understand something of this post and I will try to help you as much as possible ^^. However, if you’re seeking the best possible quality at the lowest possible bitrate, x264 is a much better option than the Apple codec.
If you’re interested, here’s a complete breakdown of the encoding parameters used in each preset and some performance (but not quality) comparisons.
Unless you absolutely know what you’re doing, I would leave all other parameters at those selected by your preset. Now I work in Seville, in FADA-CATEC, and I’m really happy because I have the opportunity to continue working in topics closely related to my previous research but applied to the industry and therefore I can see the final implementation and operation of these researchs in real systems. In the latter situation, we create streams with the function av_new_stream and assign them the appropriate codec for coding the data we are going to send. In the following two lines we set the AVOutputFormat pointer and the file path to our muxer. This parameters are retrieved by the function av_find_stream_info analysing few packets from streams. If we configure manually these parameters we need to know previously the specific configuration of the data we are going to receive. This value determines the time stamp that will be accessed by other applications in order to show properly the output.
For the particular case in which we send video and data over UDP with a mpegts muxer, the function av_find_stream_info stay hanged receiving packets without be able to determine these parameters. After that we open the codec, allocate the AVFrames and the video buffer and create the converter to transform the images received into a desired format. I loved it so much as a kid that I developed a technique to make my own animations with my parents’ MiniDV camera by rapidly stopping and starting the record function. So, for this particular case we have to stablish these parameters manually as I explain later.
Because it is a cross-platform media player, it runs on Windows, iOS, OS X, Android, Solaris, QNX, etc. Linux Stopmotion is fine for faffing about with a web cam, but it’s not powerful enough for professional work. At the most basic level, we need some way of connecting a camera to our computer for remote shooting and a way to compile those images into a movie. You can still make animations by shooting blindly with you camera, copying the files to your computer, then compiling with avconv. Entangle is constantly being updated, and I found that the version in the software repository had major problems that had been addressed in the newest release.
Before we can install the program, we also need to make sure we have all of the build dependencies installed.



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