.mp4 encoding to H.264. You always want to make sure that your extension coincides with your intended codec. A list of extensions and codec defaults can be found here.
Error: No such file or directory:
There are a few reasons why this error may be appearing. First, check to make sure that you are in the correct directory. It can be easy to lose track of where your files are actually stored, especially on a personal computer. If you are working on a personal computer, the easiest way to do this is to check where your files are. When working with MacOS, for example, files are often stored in the downloads or documents folders. To change your directory from home to this specific directory, use the command cd followed by your desired folder. For downloads, it would look like this: cd downloads
There are a few reasons why this error may be appearing. First, check to make sure that you are in the correct directory. It can be easy to lose track of where your files are actually stored, especially on a personal computer. If you are working on a personal computer, the easiest way to do this is to check where your files are. When working with MacOS, for example, files are often stored in the downloads or documents folders. To change your directory from home to this specific directory, use the command cd followed by your desired folder. For downloads, it would look like this: cd downloads
After you have ensured that you are in the correct directory, and the error is still occurring, check that your argument is formatted correctly. If you are copying and pasting from a separate document or ffmprovisr directly, there may be typos or missing spaces.
If the error message includes other parts of the command, such as a flag, that indicates where your typo or missing space may be, as in this example, where the -c flag has not been separated from the file name:
Sometimes, when copying and pasting, even if the command is free of typos and correctly formatted, the error may occur. When this happens, it is best to attempt to rewrite the command from scratch in the command line.
+Could not find tag for codec.
+
This error message comes when attempting to rewrap a file that has audio or video codecs that are incompatible with the output files extension. This is discussed briefly at the bottom of the rewrap recipe, where it is suggested that you look through possible transcoding recipes. Being able to transcode the file into the correct codec for rewrapping before you run the rewrap command is ideal, but if you are not fully familiar with transcoding and are sure that the extension you are using for your output file will automatically encode the streams with the correct codecs, removing the -c copy flag will solve this error.
Killed:
-"killed" does not appear as a normal error message, but will show up at the end of the progress of the command, and the point at which it appears can vary. Sometimes, after you run a command it will be "killed" immediately, only making it through one frame before terminating, as in this example:
+"Killed" does not appear as a normal error message, but will show up during the output of the command, and the point at which it appears can vary. Sometimes, after you run a command it will be "killed" immediately, only making it through one frame before terminating, as in this example:
Could not find tag for codec: