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• avformat/hls : Be more picky on extensions

  16 janvier, par Michael Niedermayer

  avformat/hls : Be more picky on extensions
  This blocks disallowed extensions from probing
  
  It also requires all available segments to have matching extensions to the format
  
  mpegts is treated independent of the extension
  It is recommended to set the whitelists correctly
  
  instead of depending on extensions, but this should help a bit,
  
  and this is easier to backport
  Fixes : CVE-2023-6602 II. HLS Force TTY Demuxer
  
  Fixes : CVE-2023-6602 IV. HLS XBIN Demuxer DoS Amplification
  The other parts of CVE-2023-6602 have been fixed by prior commits
  Found-by : Harvey Phillips of Amazon Element55 (element55)
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] doc/demuxers.texi
  • [DH] libavformat/hls.c

• Stream Recorder Using FFmpeg Fails on AWS Lambda

  10 mai, par user30495567

  I am trying to stream audio from URLs and save them to a file in S3 using AWS Lambda with FFmpeg. Here is an example FFmpeg command I'm using :

  


  ffmpeg -hide_banner -loglevel error -t 10 -i http://playerservices.streamtheworld.com/api/livestream-redirect/KTOOFMAAC_SC -ar 16000 -b:a 64k -ac 2 output.mp3


  


  

  • The FFmpeg command is getting called in a python script using subprocess.Popen()

  


  • The command works as expected on local, but does not work in an AWS Lambda python environment using a custom FFMPEG layer configured with these instructions.

  


  • When run on Lambda, I get the following error : FileNotFoundError : [Errno 2] No such file or directory : '/tmp/output.mp3'

  


  


  Note : I've also tried a version where I use python requests to stream chunks and pipe them into ffmpeg. This works for some stream URLs, but for others, such as the streamtheworld URL above, it only saves 5 seconds of audio from the stream or results in a Broken Pipe error.

  


• I detected an error downloading a twitch tv stream. I use ffmpeg. That error stops the download, how can I fix it ? [closed]

  9 juin, par sort35ofn

  I wanted to perform a download via ffmpeg of a video streamed live on the Twitch tv platform. I have windows 10 and I use cmd to run ffmpeg.

  


  The command I use to download the concert is :

  


  ffmpeg.exe -i "m3u8-link" -c copy name.ts


  


  I once downloaded with yt-dlp, but noticed that the quality was noticeably lower, at least using the following command :
yt-dlp.exe -f (bestvideo+bestaudio/best) "amazon-channel-link"

  


  That's why I prefer to download with ffmpeg. Normally I haven't had any problems with downloads. But this is already the third time (not continuously/consecutively) that I get this error. That error causes the download of the stream to terminate. It is not like in other occasions that sometimes a .ts fragment (of 3 seconds, for example) has already expired (and is not included in the download) but the download continues.

  


  [https @ 000001edada180c0] Opening 'https://sae12.playlist.ttvnw.net/v1/playlist/Cr4GlKuutNM7CxfM9Sq0mdUFxA8uA3F2oluPaJOmOPaBjmTkdiv4RxnkTtt_tEV8t2CyuH6D1E0HB3Erpbjq3mCfV5KqO4GfOMNOElmyYe2AKZcyQJHNeavrFfVBPB_pbDS5PYWTzUHoS0iTLfmn2cx-wHMHXa5MO-IdGPRixWDvezKNhOebWYscoIWvYwstshPSFvem1EN1UES7QfIDHSlBcZF3lGeVpg2yl05dhVwAX8YI9rnBtXYbwAUwcjEmPiqk_wm6oEX-2LRsw_05dznnVv6BbyYsLvyZu810xt9BNQU6rNCSzuoZhVx8gFxoyEdUt-VV3L_xj78-5CFibrvnO4uCafCZ5-wE_bEtUQeuHsLmm9Qf9Pj5BIGB2BHWm2LqlGTHcDG-8Z0u1-3_FB_h7fN7-uuyN-6-lreZYHDPviM8hKHFMU3zwNY29elgKRPgVMJ-4ysLWGuOPdwrylJpLFJSzsXhZaEE4p_4Zg6gfDuozYYttmPI2G1LErd5p1lT9DkQncFZibymap5Fiv-x21-jeNbrZo92PfW7lIo6NPdlnPWyoUTOb2KjgU9R0fm1UJt1kQJmQMVyDN2OHZ4t7dcAfyGMTwU26O7DdaYZhhv8mPMteBZcyjnLKH7e5AMtHUEVO2r9QIOiH0wDLNh-f9WS2kmRdJENBvl5mMGdyVHhBc9K9G5SuxBesi6F_9P_8agwpPo51m8ikJvSVJKduoIfVLSuto2SIe4DFI7hMxbplWfxBb1PNEoMWyeQd0iHUwDqQwVCFHq8OhGBp1EJtx1CNVtBhztLIqNXBbxR1Cdy8tx5rdJjq4EKlFKU3eh3_aRkhe7gulUKx2cZYNg4bGHpNBU1DP-std8xG1ckPdTpig-h_1okYPd7sXnynBFnhMHkVipsIJC4fkoT2MXHo3ItgMgTUBh1-oWD6qaD00VDM9TyDcCawJt-kI8-KnwlUkh7pq2cUv9ODqSjm5xcLoxPUxutCoZ9aKq9cnV0kqKPXxmLOekmgWK8G8MjFZ6Es5n46NeKREgQEBUTf2TZkUTOHZAiElyPy0ZdyOxFkdFZ06yqq8zUWG_dnhpgbrS1SueCOx5rGInRIdg94TIaDLMJTUvkLrqDdcS2jiABKgl1cy1lYXN0LTIwuAw.m3u8' for reading
[https @ 000001edad715600] HTTP error 500 Internal Server Errortrate=4480.2kbits/s speed=1.01x elapsed=0:17:30.76
[hls @ 000001edab89e500] keepalive request failed for 'https://sae12.playlist.ttvnw.net/v1/playlist/Cr4GlKuutNM7CxfM9Sq0mdUFxA8uA3F2oluPaJOmOPaBjmTkdiv4RxnkTtt_tEV8t2CyuH6D1E0HB3Erpbjq3mCfV5KqO4GfOMNOElmyYe2AKZcyQJHNeavrFfVBPB_pbDS5PYWTzUHoS0iTLfmn2cx-wHMHXa5MO-IdGPRixWDvezKNhOebWYscoIWvYwstshPSFvem1EN1UES7QfIDHSlBcZF3lGeVpg2yl05dhVwAX8YI9rnBtXYbwAUwcjEmPiqk_wm6oEX-2LRsw_05dznnVv6BbyYsLvyZu810xt9BNQU6rNCSzuoZhVx8gFxoyEdUt-VV3L_xj78-5CFibrvnO4uCafCZ5-wE_bEtUQeuHsLmm9Qf9Pj5BIGB2BHWm2LqlGTHcDG-8Z0u1-3_FB_h7fN7-uuyN-6-lreZYHDPviM8hKHFMU3zwNY29elgKRPgVMJ-4ysLWGuOPdwrylJpLFJSzsXhZaEE4p_4Zg6gfDuozYYttmPI2G1LErd5p1lT9DkQncFZibymap5Fiv-x21-jeNbrZo92PfW7lIo6NPdlnPWyoUTOb2KjgU9R0fm1UJt1kQJmQMVyDN2OHZ4t7dcAfyGMTwU26O7DdaYZhhv8mPMteBZcyjnLKH7e5AMtHUEVO2r9QIOiH0wDLNh-f9WS2kmRdJENBvl5mMGdyVHhBc9K9G5SuxBesi6F_9P_8agwpPo51m8ikJvSVJKduoIfVLSuto2SIe4DFI7hMxbplWfxBb1PNEoMWyeQd0iHUwDqQwVCFHq8OhGBp1EJtx1CNVtBhztLIqNXBbxR1Cdy8tx5rdJjq4EKlFKU3eh3_aRkhe7gulUKx2cZYNg4bGHpNBU1DP-std8xG1ckPdTpig-h_1okYPd7sXnynBFnhMHkVipsIJC4fkoT2MXHo3ItgMgTUBh1-oWD6qaD00VDM9TyDcCawJt-kI8-KnwlUkh7pq2cUv9ODqSjm5xcLoxPUxutCoZ9aKq9cnV0kqKPXxmLOekmgWK8G8MjFZ6Es5n46NeKREgQEBUTf2TZkUTOHZAiElyPy0ZdyOxFkdFZ06yqq8zUWG_dnhpgbrS1SueCOx5rGInRIdg94TIaDLMJTUvkLrqDdcS2jiABKgl1cy1lYXN0LTIwuAw.m3u8' with error: 'Server returned 5XX Server Error reply' when parsing playlist
[https @ 000001edad714900] HTTP error 500 Internal Server Errortrate=4480.2kbits/s speed=   1x elapsed=0:17:32.82
[hls @ 000001edab89e500] Failed to reload playlist 0
[https @ 000001edab8a4dc0] Opening 'https://c513a515af41.chantenay.akamai.hls.ttvnw.net/v1/segment/CvUCxQ8TAK7dXfVU_OB77Tl0jy4jVuXiNgXG_97z6zGC4vXLrJNkgegJgVTcnrjyxZuL37UAeKJ9nhR48Yq2YRy_r8EnJ3PyAX407Gj21HDw3AG1KFXL-Z1ysn7DFTvOb434uA_farXGB276wYH-n0dFr7TzD7G2sCLcYSZeyadGEwJbq3wvb7AglP8UEU0JxwZRVKWx0zX9Vd4I3EiSdAUP7w96T75UBwreFKwxvq16-od59YpbneYRYUYkgKEZSLTgrmCkm_nN4FWxOCSOhFHqHmjCenSREMJMdSHbhcqgvU5pdIxSm0ITMAxY4jX6cUTFKsqYGeKwCMHjy0gptCuPGVvEJCffxq00YNmF194USBRWumBZCp0TuRtI4LzjyPB1LARLdzJ56bCibI6lRE4hDn53zAV5ZUcWlkUIuUJ52D4vH3fRl85AQHV8UiWl8MEfyjJ4B8XxThp7lZ8nhAX42pUJ_8YgaK6BO51syG2Rkm9icm8ddRoM8pDl2Pkp8FgFncdIIAEqCXVzLWVhc3QtMjC4DA.ts?dna=CnWfUp8FT0O95nMtHpmzX-0LudnQmJLc-YARNX594okBXpxNtNQOAoOFUhTgI3_AReiOPiW_1e2e3oeoXJfoJbH4KZniEQhFhSWU7wMaSzM8CkZomzvn1Gig5l71lY9wSw8DV-QRh6LK7zfRqp5yy547EAFTbcwaDDnujf_TZXo1TVET8CABKgl1cy1lYXN0LTIwuAw' for reading
[https @ 000001edad4be180] Opening 'https://c513a515af41.chantenay.akamai.hls.ttvnw.net/v1/segment/CvUCvDoClU0qVRu8zB4Vm0gdhBMUSkOd9X-6zOlmLSLjAZDs-Oxj_mW5vBJWinuwpM4xU4bDToC8hfj7Xv80h6Rc93voJNaNiUxYWszEFu1AJh-_LsqxEJA-3nW8MBNo9YeaecC_EX8TF0VTaVBGiLI1SQNREb-1B5pAkYXfVcO_OSI2QqrssKXbBzkNwsx6dW38ir7CNT9qTZACJGzDZkxXYrSlArubviw_wXxSKXQKn0YcF3yXeKO4iXHRjkyrX0rnaSM3PRDJhr1xGT47u9J5jymTL55O9QRLS-9Z8ZN1LhqpXLxBFJbFi-4v_yJZWponNmS3F6b3rMhW3WCv5qw96B4UHF7NjFJWk0LmyLTkNcBAPC2yyARDZ02MoIXPzMSEq9Z1O4jrASPj34HXA_8BdxqZdVtyzjEekR2ThJkueLyFshQ3HIGkeFH49xpQmDNgE93VovfMACG9RTUCIPP9cZuOhTkoFBpT7JSrOx_p2oS3q4QiYxoMQNuunEN7QhQW4OPMIAEqCXVzLWVhc3QtMjC4DA.ts?dna=CnWfUp8FT0O95nMtHpmzX-0LudnQmJLc-YARNX594okBXpxNtNQOAoOFUhTgI3_AReiOPiW_1e2e3oeoXJfoJbH4KZniEQhFhSWU7wMaSzM8CkZomzvn1Gig5l71lY9wSw8DV-QRh6LK7zfRqp5yy547EAFTbcwaDDnujf_TZXo1TVET8CABKgl1cy1lYXN0LTIwuAw' for reading
[in#0/hls @ 000001edab89e3c0] Error during demuxing: Server returned 5XX Server Error reply 1x elapsed=0:17:33.34
[out#0/mpegts @ 000001edab92e880] video:547017KiB audio:12398KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 3.451806%
frame=26450 fps= 25 q=-1.0 Lsize=  578726KiB time=00:17:37.96 bitrate=4481.2kbits/s speed=   1x elapsed=0:17:33.35

yt-dlp>


  


  Is there any way to prevent this error ? Or can I do something so that the download does not stop because of this error ?

  


  And excuse me but I forgot to take a screenshot of the cmd screen, so I don't remember the colors of the letters (it certainly changed the colors of the letters when the error appeared). So I proceed to indicate that the error starts when it says : “ [hls @ 000001edab89e500] keepalive request failed for ”.