On Monday, June 3, 2019, 10:28:43 AM CDT, Moritz Barsnick <[email protected]> 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:[email protected]: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:[email protected]: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:[email protected]: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) configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-librsvg --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --enable-opencl --disable-outdev=xv --enable-audiotoolbox --enable-videotoolbox --enable-sdl2 --disable-securetransport --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac 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:[email protected]: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 _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
