I have some bitmap files (jpeg, png, ...) and I want to write a C++ program that joins those bitmap files to pes stream (mpeg-2 format), then create a sub file (.sub/.idx: vobsub subtitle files).
Can you give me some hint?
Thanks
Can't you just call ffmpeg ?
First gogle result : http://tooloftrade.blogspot.fr/2011/10/merging-images-into-movie-using-ffmpeg.html
Related
HiI'm trying to create a "Speech to text" app that can transcribe any audio/video file. I've created an app based on this post and it works great for WAV files. But if I use an MP3 file, the line hr = cpInputStream->BindToFile(wInputFileName.c_str(), SPFM_OPEN_READONLY, &sInputFormat.FormatId(), sInputFormat.WaveFormatExPtr(), SPFEI_ALL_EVENTS); returns
The Parameter is incorrect
The question is, can I use MP3 files as input for SAPI? and if yes, how do I determine the correct format for the call to hr = sInputFormat.AssignFormat(SPSF_16kHz16BitStereo) because SPSF_16kHz16BitStereo will certainly not be correct and I don't think we should hardcode it.
I have a file with .amr extension, and I want to get it's sample rate and number of channels using Microsoft Media Foundation. Further, I want to decode and get the uncompressed data.
I can successfully get those from .aac .mp4 and other file types but not from from a .amr file (or 3.gp file which contains .amr track).
So, for other types I do:
IMFSourceReader *m_pReader;
IMFMediaType *m_pAudioType;
MFCreateSourceReaderFromURL(filePath, NULL, &m_pReader);
m_pReader->SetStreamSelection(MF_SOURCE_READER_ALL_STREAMS, false);
m_pReader->SetStreamSelection(MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
m_pReader->GetCurrentMediaType(MF_SOURCE_READER_FIRST_AUDIO_STREAM, &m_pAudioType);
UINT32 numChannels,sampleRate;
m_pAudioType->GetUINT32(MF_MT_AUDIO_NUM_CHANNELS, &numChannels);
m_pAudioType->GetUINT32(MF_MT_AUDIO_SAMPLES_PER_SECOND, &sampleRate);
Consider there are no any errors during this code.
For .amr files, some garbage is being written in the numChannels and sampleRate.
Does anyone have experience with this and knows how to recognize and/or get proper channels and sample rate for further decoding?
BTW, Windows Media Player plays this file with no problems.
Thanks in advance.
So I found out that it supports decoding for .amr files not encoding.
Just before we get this properties:
UINT32 numChannels,sampleRate;
m_pAudioType->GetUINT32(MF_MT_AUDIO_NUM_CHANNELS, &numChannels);
m_pAudioType->GetUINT32(MF_MT_AUDIO_SAMPLES_PER_SECOND, &sampleRate);
We have to set a new media type to our Source Reader
m_pAudioType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio)
m_pAudioType->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_Float)
m_pReader->SetCurrentMediaType(MF_SOURCE_READER_FIRST_AUDIO_STREAM, NULL, m_pAudioType);
Is it possible to change the frame rate of an avi file using the Video for windows library? I tried the following steps but did not succeed.
AviFileInit
AviFileOpen(OF_READWRITE)
pavi1 = AviFileGetStream
avi_info = AviStreamInfo
avi_info.dwrate = 15
EditStreamSetInfo(dwrate) returns -2147467262.
I'm pretty sure the AVIFile* APIs don't support this. (Disclaimer: I was the one who defined those APIs, but it was over 15 years ago...)
You can't just call EditStreamSetInfo on an plain AVIStream, only one returned from CreateEditableStream.
You could use AVISave, then, but that would obviously re-copy the whole file.
So, yes, you would probably want to do this by parsing the AVI file header enough to find the one DWORD you want to change. There are lots of documents on the RIFF and AVI file formats out there, such as http://www.opennet.ru/docs/formats/avi.txt.
I don't know anything about VfW, but you could always try hex-editing the file. The framerate is probably a field somewhere in the header of the AVI file.
Otherwise, you can script some tool like mencoder[1] to copy the stream to a new file under a different framerate.
[1] http://www.mplayerhq.hu/
HRESULT: 0x80004002 (2147500034)
Name: E_NOINTERFACE
Description: The requested COM interface is not available
Severity code: Failed
Facility Code: FACILITY_NULL (0)
Error Code: 0x4002 (16386)
Does it work if you DON'T call EditStreamSetInfo?
Can you post up the code you use to set the stream info?
I want to create a program, which gets a video-file from Qt, converts that video file to TIFF-files and sends them to an algorithm which handles these TIFF-Files.
My questions:
is it possible with ffmpeg or avcodec not to convert a video-file to TIFF-files first on harddrive and send them to the algorithm after that, but to convert frame for frame and send it to the algorithm right away?
The more important question: Is it possible to do that not with an external process with ffmpeg.exe, but with ffmpeg.dll? Or is it only possible with avcodec.dll? (It doesn't have to be "on-the-fly" like at my point above) How can I create a ffmpeg.dll with header and lib?
for exporting tif :
http://www.repaire.net/forums/cinema-numerique/215306-projet-dencodage-dcp.html
Creating a tiff from second 29 in a mpeg, using ffmpeg dd201110 can be done like this:
ffmpeg -i 'test.mpg' -vframes 1 -compression_level 0 -ss 29 'test.tiff'
YMMV :-D
If you dont want to store the image as a file, take a look at ffmpeg-php
http://ffmpeg-php.sourceforge.net/
$movie->getFrame([Integer framenumber])
Returns a frame from the movie as an ffmpeg_frame object.
$frame->toGDImage()
Returns a truecolor GD image of the frame.
There may be C code underneath you can reuse..
do you have a working code to share.
I’m trying to figure out how to save to a file an IBitmapImage image.
I need to resize existing .jpg file and it seems like the only API for Windows Mobile. I managed to load it convert it to IImage -> IBitmapImage -> IBasicBitmapOps and resize it finally, but I have no clue how to save it properly to a new file.
Use IBitmapImage::LockBits to get access to the image data via its BitmapData* lockedBitmapData parameter. Use the BitmapData to prepare a bitmap file info header, then write that one and the image data in BitmapData::Scan0 to a file using regular file writing with ::WriteFile or higher level ones if you use such.