FFmpeg RTSP Stream Example: Resolving Issues with HLS Segments and Archive Management

When it comes to streaming video content using FFmpeg and RTSP, there are several nuances to consider. In this article, we'll explore a common issue that can arise when using the `append_list` flag in combination with the `program_date_time` option in HLS segment creation. We'll also discuss potential solutions and alternative implementations for managing archive files.

The Problem: Incorrect Program Date Time in Manifest

When utilizing the `append_list` flag, you may encounter an issue where the program date time in the manifest is set incorrectly. This can cause problems when trying to delete records after a certain amount of time (e.g., one day or a week). The `program_date_time` option is essential for ensuring that HLS segments are correctly timestamped and deleted accordingly.

Current Implementation: Two Separate Streams

To resolve this issue, you're currently creating two separate streams using FFmpeg. One stream captures the video content, while the other creates an HLS stream for streaming to your website. The archive files are not deleted, as they're intended to be played back by users. However, this approach can lead to file accumulation over time, making it difficult to manage your storage needs.

Alternative Implementation: Implementing a Custom Archive Manager

To address the issue of deleting records after a certain amount of time, you could consider implementing a custom archive manager using FFmpeg's command-line interface. This would allow you to create a script that periodically deletes archive files based on their timestamp or age.

Here's an example of how you might implement this:

```bash

#!/bin/bash

# Set the directory path for your archives

ARCHIVE_DIR=/path/to/archives

# Set the maximum age for archived files (e.g., 1 day)

MAX_AGE=86400

# Loop through all files in the archive directory

for file in $ARCHIVE_DIR/*; do

# Get the file's timestamp

FILE_TIMESTAMP=$(stat -c '%Y' '$file')

# Calculate the age of the file

AGE=$(date +%s -d @$FILE_TIMESTAMP)

# Check if the file is older than the maximum allowed age

if ' $AGE -lt $(date +%s) - $MAX_AGE '; then

# Delete the file

rm '$file'

done

```

In this article, we've discussed a common issue that can arise when using FFmpeg and RTSP to create HLS streams with `append_list` flag enabled. By implementing a custom archive manager or exploring alternative solutions, you can effectively manage your archive files and ensure they're deleted according to your desired schedule. Whether you choose to stick with the current implementation or opt for a different approach, understanding the nuances of FFmpeg and RTSP is crucial for delivering high-quality streaming experiences to your users.

References

* FFmpeg documentation: 'RTSP Streams'(https://ffmpeg.org/ffmpeg-all.html#Options-17)

* FFmpeg documentation: 'HLS Segments'(https://ffmpeg.org/ffmpeg-all.html#Options-18)

Ffmpeg rtsp stream example