#Flv files no length in file details mp4

The file is definitely more than 5 seconds long when I attempt this.

In fact, ffprobe shows the following for the video: Video: h264 (High), yuv420p, 640x480, 2000 kb/s, 25 fps, 25 tbr, 1k tbn, 50 tbc If I wait until the file has finished encoding and run the same ffmpeg command, there is no error. Could not find codec parameters for stream 0 (Video: h264, none, 2000 kb/s): unspecified size

This applies to Windows 7 which I use on three computers, Windows 10 may very well be different To see the properties of all media files, there is a utility that is usually installed. put ffmpeg.exe in the same directory as the flv and make a small 2 line bat file like this example: test.bat ffmpeg.exe -i 'Your File name. Alternatively, go to the File menu, click Open and the open-file dialog will appear. Find the FLV video file that you want to watch and click Open button to open it. Click the Open File button in the main interface to trigger the open-file dialog. For instance, with a Flash file that has a length of 30 minutes, you do not have to download the entire file to view the last two minutes. View -> Details then right-click on the field bar, click Length. There are two ways to open a FLV video file. When I attempt to cut a part (first 5 seconds) of the video with ffmpeg while it is still encoding, ffmpeg produces an error: $# ffmpeg -i file.flv -t 00:00:05.000 -c copy test.mp4 Right click in the white space of any folder where the audio files are kept.

#Flv files no length in file details mp4

I chose flv because I wanted to be able to play and cut pieces of a video while it is encoding and flv is supposed to support this behavior. File Size: Since MP4 utilizes more advanced video compression code, its certain that MP4 has a smaller file size than FLV. You will get a big endian 32 bit value that represents the size of the tag just before these bytes (FLV files are made of tags). Just fopen the file and seek 4 bytes before the end of the file. I'm using libx264 as the codec and flv as the container. FLV files have a specific data structure which allow them to be parsed in reverse order, assuming the file is well-formed. I'm encoding a video with libavcodec and libavformat.