Media files At a very high-level view, a media file is broken up into a container and its streams. Neither is inherently better than the other, as each is trying to do different things. I used the command youtube-dl -F to list the videos on a non-youtube site. Continue this conversation via email Get only replies to your comment, the best of the rest, as well as a daily recap of all comments on this post. Please consider editing your answer to include more detail.
Each codec has its own properties, strengths, and weaknesses. The simplest method is to change the bitrate, which may or may not result in a different quality. Adjusting frame rate and bitrate are two crude but effective techniques for affecting media quality. In these devices, if the user does not press the play button, the video will not begin to reproduce. You can also specify a different video format such as mp4. The - for both commands specifies that a pipe will be used for output and input respectively. Another way we can impact quality is to adjust the frame rate of the video using the -r option: ffmpeg -i input.
Input 0, mov,mp4,m4a,3gp,3g2,mj2, from 'input. It presents a single interface that media players and tools can interact with. In the example we have mentioned before we get a video 40 times smaller. Why would you even want to use a lossy video format output. First we will convert this 46 seconds video into a 20 seconds video extracting from second 15 to second 35 of the original video.
Many require certain streams and metadata or put restrictions on the codecs or contents allowed. If a video has a duration of 20 seconds, and 5 of them really do not contribute to the video, we can remove thus having a video of 15 seconds and therefore smaller. But it will get a warning like Buffer queue overflow, dropping. If you would prefer to avoid intermediate image files, the commands provided by LordNeckBeard can be piped between ffmpeg and ImageMagick's convert so that no intermediate files are required: ffmpeg -i input. Changing the quality of your files is a very subjective matter, which means there is no one way that will work every time. I made my own version of the script, which parameterizes the output resolution and frame rate as well. Red Hat and the Red Hat logo are trademarks of Red Hat, Inc.
Youtube-dl has several options for controlling the quality and format of the downloaded video, but I find it easier to use the command above. This explanation is enough to get you through this article. Note that the output from the -layers Optimize may not always provide a smaller file size, so you may want to try converting to a gif without optimization first to be sure. Running the command mediainfo inputFile. Modifying the streams Often you have a file that is almost perfect, and you just need to trim a few parts off.
To learn more, click on the links above. This flag lets you set the different codec to use for each stream. It is not clearly shown on source code. Other times it might do nothing but change the file size. For example, to set the audio stream to be Vorbis, you would use the following command: ffmpeg -i input.
Any ideas how can I improve quality of converted gif? This also works with videos: ffmpeg -i input. Among these options there is the self-reproduction option autoplay parameter , so a video starts playing immediately when the page loads. Problem: I do not know the directory where the video is located. It's often used behind the scenes in many other media-related projects. Basic conversion The thing that trips up most people when it comes to converting audio and video is selecting the correct formats and containers. Remember that during this whole process everything is in memory so you may need sufficient memory if the images are quite large.
Below is the batch file for Windows users: gifenc. The available format streams are shown. It can be very time consuming to re-encode the correct stream. I'm trying to convert a. You probably do not want to convert the entire file at its original resolution and frame rate. Provide details and share your research! Be aware that video and audio encoding can take a very long time to run.
Thoughts on how to fix? Generally we like answers on the site to be able to stand on their own - Links are great, but if that link ever breaks the answer should have enough information to still be helpful. Tools like or are fantastic, but sometimes you just want to change a file from one format into another quickly. This means the command: ffmpeg -i input. Setting these values very high cannot improve the quality of an existing source if its quality is already low. To learn more, see our. To set the bitrate of each stream, you use the -b flag, which works in a similar fashion to the -c flag, except instead of codec options you set a bitrate. It works to display the list of available formats even though it is not a youtube site.