Hi Cyril, I remember that in the first tests I made before answering your first email > in this thread, I tried to use -ss and -t params with both ts and mp4 > output formats. The ts segments were seemingly random length whereas the > mp4 seemed strictly of the same length.
Good to know. In fact, when putting -ss at the start (before -i) and -t at the end (after the codec details), I think the segment length is correct because both the number of frames and the durations are the same, according to ffprobe. > Concomitantly, it seems that HLS is > now officially compatible with mp4 segments. See > https://en.wikipedia.org/wiki/HTTP_Live_Streaming#Using_fragmented_MP4 . > Could that be a way out? > Yeah, fragmented MP4 is an option, but as far as I know, it requires an "initSegment" plus the individual segments while the TS /looked/ simpler at first. But maybe creating the initSegment is not that hard in fact. That might be a workaround indeed... (Plus, that would be DASH-compatible and natively playable in recent browsers...) > Also, care to share the ffprobe command-line or other tool you're using to > extract a compact string of video frame types (e.g. "IBBBPPBBPBPB") from a > media? > Sure. I asked chatGPT :-) (no kidding). To extract picture information with ffprobe, I'm running ffprobe -select_streams v -show_frames -print_format json -i <file.ts> > streams.json Then to print the structure in IBBP format, I'm using a small Java program which loads that JSON into a String and parses it using the Jacskson library (com.fasterxml.jackson). Something along the lines of: ObjectMapper mapper = new ObjectMapper(); JsonNode root = mapper.readTree(jsonString); for (JsonNode frame : root.get("frames")) { String pictType = frame.get("pict_type").textValue(); if ("I".equals(pictType)) System.out.println(); System.out.print(pictType); } I might try a few more things with TS files before switching to MP4. I'll let you know of course Thanks for the help, Vincent _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
