Why is ffmpeg not transcoding videos with short duration.

1. Insufficient command line arguments or misconfiguration: Ensure that the input file path, output file path, and desired format are correctly specified in your FFmpeg command. If these parameters are missing or incorrectly set up, the transcoding process may not start at all, and you might assume that it's an issue with short-duration videos.

2. Incorrect input format: FFmpeg supports a vast array of media formats, but if the provided video file is in an unsupported or poorly-implemented format, it might not be able to transcode it correctly. In such cases, you can try converting the video file into a more widely supported format like MP4 or AVI before attempting transcode with FFmpeg.

3. Performance limitations: In some cases, the short duration of a video file might not justify the overheads involved in launching and closing FFmpeg for each transcoding task. The process of starting up an application like FFmpeg, opening input files, performing the transcode operation, and saving output files takes some time and resources. For extremely short videos (less than a second or two), this overhead might outweigh any benefits of transcoding, making it impractical to proceed with the process.

4. Incorrect usage: If you're using FFmpeg for tasks that are not well-suited for its capabilities or if your command line arguments are incorrect, it might fail to transcode short videos. For instance, some users may attempt transcoding a single image file using FFmpeg without specifying any duration or frame rate information in their command line arguments – this would result in an error and no transcode operation.

5. System resource limitations: In some instances, the system resources available to FFmpeg might not be sufficient for transcoding very short videos due to their small file size. For example, if your machine has limited processing power or RAM capacity and the video files you're trying to transcode are extremely short (less than a second), FFmpeg might not be able to access enough resources to complete the process efficiently.

6. Bug or issue in specific builds: There's a possibility that there could be bugs or issues with certain FFmpeg builds when handling very short videos. If you suspect this might be the case, consider checking for updates to your specific build of FFmpeg or seeking help from its community forum or support resources.