codec

问题 I'm looking for the best in quality when converting videos. I only want to use lossless audio and video encoders and a good container. How do I enable lossless x264 vcodec for ffmpeg? I currently use ffmpeg -i "inputvideo" -s 1280x720 -ar 48000 -threads 4 -vcodec libx264 -acodec copy -dsur_mode 2 -ac 6 "outputvideo720p.mkv" I plan on using flac for the acodec by am unsure because I don't want to use quality if it switches to 16-bit instead of 24-bit 回答1: You can use x264 in lossless manner I

问题 many media says firefox support h264 in webrtc, but I can't find any information. How to enable h264 in webrtc? This is my mediaConstraints var mediaConstraints = { video: { mandatory: { maxWidth: 640, maxHeight: 480 } }, audio: true }; 回答1: It would seem that H264 is not supported by default yet. You will have to add the codec line manually into the SDP before setting it as local and sending the offer. It does look like they are hard at work to get it out soon. You can see this with the work

问题 I have created a .exe file of a simple script with intentions to run it on a server however I cannot seem to figure out what this fault means or find any answers online. The fault code is as follows: Fatal Python error: initfsencoding: unable to load the file system codec ModuleNotFoundError: No module named 'encodings' Current thread 0x00003c8c (most recent call first): To get this far I used pyinstaller pyinstaller --onefile MyScript.py When this didn't work I also tried pyinstaller

问题 I have created a .exe file of a simple script with intentions to run it on a server however I cannot seem to figure out what this fault means or find any answers online. The fault code is as follows: Fatal Python error: initfsencoding: unable to load the file system codec ModuleNotFoundError: No module named 'encodings' Current thread 0x00003c8c (most recent call first): To get this far I used pyinstaller pyinstaller --onefile MyScript.py When this didn't work I also tried pyinstaller

问题 When I try to run images assets doesn't get properly loaded, I am getting an exception: The following assertion was thrown resolving an image codec: Unable to load asset: /images/p8.png` Some weeks ago it was working and now it stopped. I tried to run from different pc and mac too (with simulator) anв still no images can be loaded. Fonts instead are properly loaded. This is how I load the images, they are rendered inside a GridView Below is the code: return new Expanded( child: new GridView

问题 When I try to run images assets doesn't get properly loaded, I am getting an exception: The following assertion was thrown resolving an image codec: Unable to load asset: /images/p8.png` Some weeks ago it was working and now it stopped. I tried to run from different pc and mac too (with simulator) anв still no images can be loaded. Fonts instead are properly loaded. This is how I load the images, they are rendered inside a GridView Below is the code: return new Expanded( child: new GridView

问题 [Error]: 21:46:56.148 [AudioQueueServer] AudioQueueObject::IONodeConnection::_AcquireHardwareCodec: failed ('hwiu') That's an error I am getting when playing a sound file. Is this a codec issue or a problem with the sound file itself? 回答1: From the docs, that error, 'hwiu', means "Hardware in use". The hardware codec is unavailable. If you are creating your own AudioQueue, you can set the hardware codec policy to kAudioQueueHardwareCodecPolicy_PreferSoftware , which will try the software

问题 I'm trying to isolate the foreground of an audio stream and then save it as a standalone audio stream using librosa. Starting with this seemingly relevant example. I have the full, foreground and background data isolated as the example does in S_full , S_foreground and S_background but I'm unsure as to what to do to use those as audio. I attempted to use librosa.istft(...) to convert those and then save that as a .wav file using soundfile.write(...) but I'm left with a file of roughly the

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I am looking for a solid open source audio compression library for java. I am working on a closed sourced project, so no copy left licenses. But I am interested in both lossless and lossy. 回答1: http://flac.sourceforge.net/license.html <-- BSD license / lossless http://jflac.sourceforge.net/ << Apache license /

问题 I need to convert '767f440128e1a00a' hex data to packed EBCDIC string. I want all result outcomes into one string but python is giving Unicode error UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe1 in position 0: unexpected end of data s='767f440128e1a00a' output = [] DDF = [1] distance = 0 for y in range (1,len(s[2:])): for x in DDF: if s[2:][distance:x*2+distance]!='': output.append(s[2:][distance:x*2+distance]) else: continue distance += x*2 print(output) final=[] result=''