On Monday, June 3, 2019, 10:56:24 PM CDT, Patrick Kirchner <patrickkirch...@yahoo.com> wrote: On Monday, June 3, 2019, 10:28:43 AM CDT, Moritz Barsnick <barsn...@gmx.net> wrote: On Mon, Jun 03, 2019 at 01:44:58 +0000, Patrick Kirchner via ffmpeg-user wrote: > SDL_OpenAudio (1 channels, 8000 Hz): ALSA: Couldn't set audio channels > No more combinations to try, audio open failed
This means that ffplay's SDL audio implementation can't play to the available audio device. Perhaps ffplay doesn't automatically try to convert to a suitable format - assuming ALSA might accept 44.1 or 48 kHz. You could try to insert an audio filter into ffplay to change the sample rate (probably "-af aresample=48000"). mplayer most likely uses some other mechanism for playing audio, perhaps OSS, and therefore succeeds by default. Cheers, Moritz _______________________________________________ Thanks Moritz. I tried a few rates but they all failed and looked like this: ffplay -fs -af aresample=48000 rtsp://nope:notmyrealpassword@192.168.1.20:554/profile3/media.smp ffplay version 4.1.3 Copyright (c) 2003-2019 the FFmpeg developers built with gcc 8.3.0 (Gentoo 8.3.0-r1 p1.1) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-4.1.3/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=core-avx2 -O2 -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --disable-optimizations --disable-libcelt --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-nonfree --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --disable-gnutls --disable-gmp --enable-gpl --enable-hardcoded-tables --enable-iconv --disable-libtls --disable-libxml2 --disable-lzma --enable-network --disable-opencl --disable-openssl --enable-postproc --disable-libsmbclient --enable-ffplay --enable-sdl2 --disable-vaapi --enable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --enable-opengl --disable-libv4l2 --disable-libpulse --disable-libdrm --disable-libjack --disable-libopencore-amrwb --disable-libopencore-amrnb --disable-libcodec2 --enable-libfdk-aac --disable-libopenjpeg --disable-libbluray --disable-libgme --disable-libgsm --disable-mmal --disable-libmodplug --disable-libopus --disable-libilbc --disable-librtmp --disable-libssh --disable-libspeex --disable-libsrt --enable-librsvg --enable-ffnvcodec --enable-libvorbis --disable-libvpx --disable-libzvbi --disable-appkit --disable-libbs2b --disable-chromaprint --disable-libflite --disable-frei0r --disable-libfribidi --disable-fontconfig --disable-ladspa --disable-libass --disable-lv2 --enable-libfreetype --disable-librubberband --disable-libzmq --disable-libzimg --disable-libsoxr --enable-pthreads --disable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --disable-libaom --disable-libopenh264 --disable-libsnappy --disable-libtheora --disable-libtwolame --disable-libwavpack --disable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-neon --disable-vfp --disable-vfpv3 --disable-armv8 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-altivec --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=core-avx2 --disable-doc --disable-htmlpages --enable-manpages libavutil 56. 22.100 / 56. 22.100 libavcodec 58. 35.100 / 58. 35.100 libavformat 58. 20.100 / 58. 20.100 libavdevice 58. 5.100 / 58. 5.100 libavfilter 7. 40.101 / 7. 40.101 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 3.100 / 5. 3.100 libswresample 3. 3.100 / 3. 3.100 libpostproc 55. 3.100 / 55. 3.100 Input #0, rtsp, from 'rtsp://nope:notmyrealpassword@192.168.1.20:554/profile3/media.smp': Metadata: title : Media Presentation comment : samsung Duration: N/A, start: -0.225000, bitrate: N/A Stream #0:0: Video: hevc (Main), yuv420p(tv), 2592x1520, 7.92 tbr, 90k tbn, 90k tbc Stream #0:1: Audio: adpcm_g726le, 8000 Hz, mono, s16, 32 kb/s Stream #0:2: Data: none SDL_OpenAudio (1 channels, 48000 Hz): ALSA: Couldn't set audio channels SDL_OpenAudio (1 channels, 44100 Hz): ALSA: Couldn't set audio channels No more combinations to try, audio open failed [rtsp @ 0x7f2ba4000b80] max delay reached. need to consume packet [rtsp @ 0x7f2ba4000b80] RTP: missed 11 packets ^C 0.93 M-V: -0.001 fd= 0 aq= 0KB vq= 491KB sq= 0B f=0/0 When I play it with mplayer I have to actually use "mplayer -ao alsa" in order for it to work, so I think it's should be possible with ffplay and alsa as well. Looks like mplayer is bumping it up to 32000 and 2 channels: ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 8000 Hz, 1 ch, s16le, 32.0 kbit/25.00% (ratio: 4000->16000) Selected audio codec: [ffg726le] afm: ffmpeg (FFmpeg G.726 little endian Audio) ========================================================================== AO: [alsa] 32000Hz 2ch s16le (2 bytes per sample) I have no luck with ffplay using "-af aresample=32000" and when I try to change it to "-ac 2" I get this type of complaint: [g726le @ 0x7f7070006600] Decoding more than one channel is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. I know ffplay (version 4.1.3) can play this stream though as I'm able to play it from my OSX laptop using a MacPorts version of ffmpeg/ffplay that is also version 4.1.3 without any issues: ffplay rtsp://nope:notmyrealpassword@192.168.1.20:554/profile3/media.smp ffplay version 4.1.3 Copyright (c) 2003-2019 the FFmpeg developers built with Apple LLVM version 10.0.1 (clang-1001.0.46.4) Input #0, rtsp, from 'rtsp://nope:notmyrealpassword@192.168.1.20:554/profile3/media.smp': Metadata: title : Media Presentation comment : samsung Duration: N/A, start: 0.064189, bitrate: N/A Stream #0:0: Video: hevc (Main), yuv420p(tv), 2592x1520, 7.92 tbr, 90k tbn, 90k tbc Stream #0:1: Audio: adpcm_g726le, 8000 Hz, mono, s16, 32 kb/s Stream #0:2: Data: none 3.63 A-V: -0.018 fd= 0 aq= 8KB vq= 491KB sq= 0B f=0/0------------------------------------------------------------------------ I've still had no luck getting this to work with my nVidia/HDMI to A/V receiver system although it plays fine on my OSX MacPorts with ffplay. With MPlayer, there are audio output options to chose either sdl or alsa seperately, but it seems that ffplay can only use alsa along with sdl. Is there another way to play something with ffplay and alsa without use sdl? Thanks,Patrick. _______________________________________________ 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".