I have quicktime movies uploaded to my server that I need to combine together (there are sound tracks too). I cannot install ffmpeg (or anything else for that matter away from standard PEAR stuff).
I suppose an option open to me would be to open up the files with php. Can anyone provide any pointers on how to do this. Am I entering a world of pain?
Thanks in advance
Tudor
Am I entering a world of pain?
Probably yes. :)
I'm not familiar with the internal workings of the mov format, but if the format is not like MP3 (in which you can actually simply just glue two files together and they'll work in most players!), what you want to do is most likely not possible in pure PHP.
Related
I am developing an API, in PHP, hosted on a linux server, that requires me to make jpeg previews for a .pptx powerpoint presentation.
I first convert the file to pdf and then convert the pdf to jpegs.
The second step is easy, with ghostscript, it's the first part that's proving difficult.
I have tried using the libreoffice executable, but pptx isn't completely compatible. Certain backgrounds become invisible.
I have the same problem with many 3rd party APIs (which I suspect also use libreoffice); the ones that do work, are ridiculously expensive.
Installing office on a Linux server and using COM functions seems impossible, or very tedious at best.
I have looked at Aspose.Slides, which also seems rather expensive, and their documentation is filled with errors.
I could use suggestions on how to tackle this problem.
I have tried to find the underlying problem of why LibreOffice and online conversion tools have a problem with the backgrounds of the presentations I need to convert.
The background is a .emf file, which has bad support.
My solution
I've unzipped the presentation, converted the .emf files to png (using ghostscript), changed all mentions of .emf to .png in the XML, and rezipped the altered presentation.
When I now use the LibreOffice headless to convert to pdf, the background shows up.
It might be a bit hacky, but it works for the intent of my program.
ps. I see that my question has gathered a few downvotes. In my opinion it was a valid question, and listed the various solutions that had worked for others, but not for me. If anyone has insights or ways to improve it, feel free to comment.
I'm working on a project and i have all the help related to the business in hlp files, i'm looking for a php viewer for that kind of files but i have not found any so far, not even a payed one.
is there any library for displaying HLP files in PHP?
Thanks in advance.
I couldn't find one for PHP, but there are various ones for Linux. You could convert it there, using system(), and then pick up the output.
Is there any library/module available with which i can generate images from a swf file?
The problem i am trying to solve is: I want to create a pdf from a web page and i am having problems in doing that when the web page has swf (question in stackoverflow)
I am thinking if i am able to read a swf and write out an image, i will be able to solve the above the problem
Will appreciate your help, Thanks
In fact, that is quite a hard task. I've spent hours looking for a program that could fulfill such a task. However, I eventually only found one. It isn't open-source but would really help you I guess.
Flash Animation Source can output all frames of a SWF file. It uses a DirectShow filter to do so. Therefore, a Windows operating system is required should you not want to use WINE.
In short, you'll just need to install Flash Animation Source on your computer and then find a way to get DirectShow frames using your desired programming language. Everything else is actually quite easy. You tell Windows the directory and the name of your SWF file and it'll do the rest, thus delivering you with an image. And did you know DirectShow filters can deliver all frames of a video? Therefore, you can choose which one you'd like to have.
By the way, please don't try to find another way to get an image of your SWF file. Believe me, you won't find one. I have looked for an open-source program that fits my needs but all of them fail. You need to use the propriertary Adobe Flash player for your outputs. There is no other option as the open-source alternatives still need a lot of development to genuinely output the vector-based frame as it is.
Does anybody know a purely PHP based way to alter the frequency of an MP3 file?
I am on shared hosting with this, so installing ffmpeg or something similar is out of the question.
If this requires actually altering the audio data, then I guess it is not possible nor feasible to do with PHP, but I was thinking maybe this is just a header setting. I don't know.
Background:
A client's website is utilizing a Flash based MP3 player to play some audio.
The client is producing the audio herself.
The trouble is that the tools that she is producing it with, and is familiar with, automatically produces MP3 files with a frequency of 48000hz, while some versions of Flash have trouble playing anything with a frequency differing from 44100khz. (See my related question here).
I would like to avoid adding yet another program to the already complex audio production process, and solve this on the web server end if possible.
I was thinking maybe this is just a header setting.
No. That is, you can probably change it in the header, if you don't mind your MP3s being played too slow or too fast with a shifted pitch.
If you want it to sound the same, you will need to re-encode. Decoding to WAV (or raw samples), resampling, then re-encoding is a possibility, and probably your only one.
Maybe the way MP3 works allows for a shortcut (like JPEG allowing for lossless rotation), but I am unaware of any such methods.
Does anybody know a ready-made, reliable way to tell the dimensions (width x height) of a MP4 encoded using the H.264 codec without ffmpeg or similar extensions, in pure PHP?
Thanks for all the answers folks. The bounty is running out and I will not have time to check the offered solutions before it does. I will accept the solution that I feel has the greatest likelihood to work.
getID3 is pure php and extracts an amazing amount of information from media files of all sorts. It will depend on what encoded your file in the first place as to what metadata is available and how reliable it is. getID3 has a nice demo page with lots of different file types. I tried to post more links but as a newbie I only get one.
It sounds like http://code.google.com/p/php-mp4info/ might be your answer. It reads MP4's but it doesn't mention anything about H.264.
also, what OS are you using?
What comes to mind:
mediainfo a huge project with GUI, but also has a CLI
mp4info (part of the seemingly defunct mp4mpeg project) is almost perfect for this
ffmpeg although this is overkill for the task. then again, you very well may need it for other tasks
ffmpeg and php: http://www.lampdeveloper.co.uk/linux/detecting-a-videos-dimensions-using-php-and-ffmpeg.html
php-reader is a full implementation of the ISO 14496 done in pure PHP. You can use this library to read all of the boxes which the mp4 consist of, like the moov atom containing metadata about the file.
Native PHP does not support anything like this, ffmpeg is only one library that come on my mind.