I'm writing a video player using libav*, and as a part of this, I need to download and display thumbnails. I use SDL_Image for local jpg and png files, but as I need to grab thumbnails from AVI files, and libav* speaks http(s), I though it would be easier to use it for all thumbnails that are outside of SDL_Image capabilities, even jpg.
However, twitch thumbnails don't work. They give the error: Could not find codec parameters for stream 0 (Video: mjpeg, none(bt470bg/unknown/unknown)): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options I can reproduce the problem with ffplay: ffplay 'https://static-cdn.jtvnw.net/cf_vods/d2nvs31859zcd8/9a64ec577e42e15dde_monstercat_52314706864_4045032770/thumb/custom-4f1e250e-1c98-4a9c-b1c1-c0d01e631503-320x180.jpeg' Curiously, if I combine ffplay with curl, it works: curl 'https://static-cdn.jtvnw.net/cf_vods/d2nvs31859zcd8/9a6864ec577e42e15dde_monstercat_52314706864_4045032770/thumb/custom-4f1e250e-1c98-4a9c-b1c1-c0d01e631503-320x180.jpeg' | ffplay - That's surprising, because as far as I know, pipes are even more restricted than http(s) connections. I tried increasing both analyzeduration and probesize without any difference (and the file is something like 16KB, so I find it unlikely that should be the problem). I cannot rule out that twitch may be doing something different depending on whether it sees ffplay or curl, unfortunately these days everything uses https making these things near impossible to debug. The problem occurs with both ffmpeg 4.4.2 and 5.0.1. Any ideas? Possible bug? _______________________________________________ Libav-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/libav-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
