HLS

HLS with MPEG-TS and fMP4 segments, an audio-only stream, and a three-rendition bitrate ladder.

The files

4 files in snapshot 2026-11-02. Each one's full fact sheet and recipe: GET /v1/cases/{id}, no token needed.

• HLS bitrate ladder (360p, 720p, 1080p)hls/abr-ladder.m3u8 HLS640x360 H.264 at 30 fps, stereo AAC at 48 kHz, 6 s, 8.1 MB Facts
• HLS, audio onlyhls/audio-only.m3u8 HLSstereo AAC at 48 kHz, 6 s, 108 kB Facts
• HLS with fMP4 segmentshls/fmp4.m3u8 HLS1920x1080 H.264 at 30 fps, stereo AAC at 48 kHz, 6 s, 5.5 MB Facts
• HLS with MPEG-TS segmentshls/ts.m3u8 HLS1920x1080 H.264 at 30 fps, stereo AAC at 48 kHz, 6 s, 5.6 MB Facts

What's in every file

Every video carries its frame number and timecode, burned in at the top left, a frame code along the bottom that the checker reads, and a white flash in the first three frames of every second. The audio carries a tone with a 40 ms beep at the start of every second. So a test can tell which frame is on screen, whether any were dropped, and whether sound and picture line up.

How they were verified

Before publishing, every file was probed and decoded by FFmpeg 7.1.5-0+deb13u1 and GStreamer 1.26.2 (sidecar subtitle files are probed only), and every file with video was played through the testsrc checker, which reads the frame code to confirm frames, timing, orientation, aspect and colour.

Use them

# one file's facts
curl https://testsrc.com/v1/cases/hls/abr-ladder.m3u8

# play every file in this category through your player and check what it showed
testsrc run --player libvlc hls/

See the API reference for tokens, quotas and snapshots.

Other baseline categories