I tried: ffmpeg -i image8.jpg -i sound11.amr -acodec copy test.aviĪnd tried a lot of combinations with and without -s 640x360, -loop_input, -shortest, -t xxx, -r 0.1 (artificially low frame rate in the hope that the video would be longer) and -f image2Įither I get errors or I get a video file of the duration of one frame.
What is the right command line that would do that? copy the audio stream without transcoding it).
I don't care very much about what video codec is used for output, but it is vital that I can use "copy" as the audio codec (i.e. I want FFmpeg to take one JPEG image and an audio file as input and generate a video file of the same duration as the audio file (by stretching the still image for the whole duration). The combination of small size and acceptable fidelity led to a boom in the distribution of music over the Internet in the mid-to-late 1990s, with MP3 serving as an enabling technology at a time when bandwidth and storage were still at a premium.This should be pretty trivial, but I can't find a way to get it to work. This allows a large reduction in file sizes when compared to uncompressed audio. About audio compression (the aspect of the standard most apparent to end-users, and for which it is best known), MP3 uses lossy data compression to encode data using inexact approximations and the partial discarding of data. MP3 (or mp3) as a file format commonly designates files containing an elementary stream of MPEG-1 Audio or MPEG-2 Audio encoded data, without other complexities of the MP3 standard. Similar to this format is M4A, which is also an iTunes Audio file, but one that isn't copy protected. It's just an AAC file that's copy-protected using a proprietary DRM technology created by Apple.M4P files are seen when downloading music from the iTunes Store. A file with the M4P file extension is an iTunes Audio file or sometimes called an iTunes Music Store Audio file.
0 kommentar(er)
