DASH VOD — Media Segment (chunk-stream0-00002.m4s)
A one-second DASH media segment, addressed by the manifest's $Number$ template. The same underlying CMAF structure as the HLS segments in the sibling package — which is the whole point of CMAF, and something a fixture set should let you verify rather than take on trust.
Rendered preview of the m4s file (19.2 KB). Download above for the original.
Specifications
- Protocol
- MPEG-DASH
- Profile
- isoff-live
- Addressing
- SegmentTemplate with $Number$
- Segment Duration
- 1s
- Ladder
- 320x180 at 300 kbps, 480x270 at 700 kbps, 640x360 at 1400 kbps
- Generated By
- ffmpeg dash muxer
- Served Inline
- yes — /files/stream/
- Cors
- Access-Control-Allow-Origin: *
What is a .m4s file?
M4S is a CMAF/fragmented-MP4 media segment: a moof header plus an mdat payload covering a few seconds of one rendition. It is not a complete file — the codec configuration lives in a separate initialisation segment, so an .m4s on its own cannot be decoded and most players will refuse it outright.
How to use this file
Use example .m4s segments to test adaptive-streaming clients, segment fetchers and CMAF parsers. Load the matching init segment first, then append segments in order; a client that can play a segment without its init is not doing CMAF correctly.
How to use this file for testing
“DASH VOD — Media Segment (chunk-stream0-00002.m4s)” is a deterministic Novus Examples fixture for Streaming manifests, Video codecs, Video QA. HLS playlists and DASH MPDs covering multi-bitrate ladders, byte-range addressing, and segment templates. Served inline with permissive CORS under /files/stream/, so a player can load them from any origin without re-hosting.
Documented properties for this file: M4S · 19,650 bytes. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
Media fixtures are short and synthetic by design. Prefer waveform or transcript ground truth in the same group when measuring ASR, trim, upscale, or sync tools; do not assume broadcast-quality masters.
Related files
- m4sHLS VOD — CMAF Init Segment (init_0.m4s)A CMAF initialisation segment: the moov box carrying codec configuration and track metadata, with no media samples. A player must fetch this before any media segment of the same rendition, and switching renditions mid-stream means fetching the new rendition's init first — the step ABR implementations most often get wrong.
- m4sHLS VOD — CMAF Init Segment (init_1.m4s)A CMAF initialisation segment: the moov box carrying codec configuration and track metadata, with no media samples. A player must fetch this before any media segment of the same rendition, and switching renditions mid-stream means fetching the new rendition's init first — the step ABR implementations most often get wrong.
- m4sHLS VOD — CMAF Init Segment (init_2.m4s)A CMAF initialisation segment: the moov box carrying codec configuration and track metadata, with no media samples. A player must fetch this before any media segment of the same rendition, and switching renditions mid-stream means fetching the new rendition's init first — the step ABR implementations most often get wrong.
- m3u8HLS VOD — Master Playlist (Playable Package)The entry point to a COMPLETE and genuinely playable HLS package: a 3-rung ladder (320x180 at 300 kbps, 480x270 at 700 kbps, 640x360 at 1400 kbps) with real CMAF segments alongside it in this group. Point hls.js or Safari at this URL and it plays — it is served inline with permissive CORS from /files/stream/, so it works cross-origin without re-hosting. Unlike the hand-authored HLS fixtures elsewhere in the catalog, which are parser tests that reference placeholder segment names on purpose, everything this playlist references actually exists.
- m3u8HLS VOD — Media Playlist (0)One rendition of the playable HLS ladder, listing its own CMAF init segment and media segments. Referenced by the master playlist in this group. Generated by ffmpeg's own HLS muxer, so the segment durations, the EXT-X-MAP and the ENDLIST are exactly what a real packager emits rather than what a human thinks one emits.
- m3u8HLS VOD — Media Playlist (1)One rendition of the playable HLS ladder, listing its own CMAF init segment and media segments. Referenced by the master playlist in this group. Generated by ffmpeg's own HLS muxer, so the segment durations, the EXT-X-MAP and the ENDLIST are exactly what a real packager emits rather than what a human thinks one emits.
Generated by generation/video_streaming_wave.py. Free for any use, no attribution required — license.