Help interpreting ffmpeg logs

January 30, 2019

I know I can post them here but I have an IT background and want to see if I can figure out some of my transcoding issues on my own.

Id like to be able to see from these logs where / why transcoding is happening

I have a user that is transcoding on Roku device

I THINK its likely due to his limited internet connection BUT Id love to be able to tell from the logs

here are some samples of the log

Emby 4.x is running on the Synology DS918+

We have 200/200 internet - He likely has DSL ...

Im assuming somewhere in here is a reference to his speed limits ?

Media Info

VideoTitle1080p H264
CodecH264
Codec tagavc1
AVCYes
ProfileMain
Level31
Resolution1920x1080
Aspect ratio16:9
AnamorphicNo
InterlacedNo
Framerate30
Bitrate3,187 kbps
Color primariesbt709
Color spacebt709
Color transferbt709
Bit depth8 bit
Pixel formatyuv420p
Ref frames1
NAL4

AudioTitleEng AAC 5.1 Default
Languageeng
CodecAAC
Codec tagmp4a
ProfileLC
Layout5.1
Channels6 ch
Bitrate552 kbps
Sample rate48,000 Hz
DefaultYes

SubtitleTitleEng
Languageeng
CodecSRT
DefaultNo
ForcedNo
ExternalYes

Containermp4

FFMPEG log

2019-01-30 09:33:12.820

Application version: 4.0.1.0

/emby/videos/63243/hls1/main/408.ts?DeviceId=f078851e-d6fd-5198-9863-59ee5a560b92&MediaSourceId=c6927642bc4a56f336d28ee7d06f21cf&VideoCodec=h264,mpeg1video,mpeg2video,hevc&AudioCodec=ac3,aac,mp2,mp3,flac,opus,vorbis,lpcm&VideoBitrate=2495448&AudioBitrate=552171&MaxFramerate=61&MaxWidth=3840&MaxHeight=2160&PlaySessionId=05c0a93a762541f384b7bf1736a18969&api_key=18ff35a8c56e45fabc4013de21355842&AudioStreamIndex=1&SubtitleMethod=Encode&TranscodingMaxAudioChannels=6&SegmentContainer=ts&SegmentLength=3&MinSegments=1&BreakOnNonKeyFrames=True&h264-maxrefframes=16&h264-videobitdepth=8&h264-profile=high,main,baseline,constrainedbaseline&h264-level=51&aac-audiochannels=6&ac3-audiochannels=6&flac-audiochannels=6&lpcm-audiochannels=6&mp3-audiochannels=2&mp2-audiochannels=2&vorbis-audiochannels=6&opus-audiochannels=6&TranscodeReasons=ContainerBitrateExceedsLimit

{"Protocol":"File","Id":"c6927642bc4a56f336d28ee7d06f21cf","Path":"/volume1/EMBY/KIDS! Movies/Animated/xxx(2016).mp4","Type":"Default","Container":"mp4","Size":3013886049,"Name":"x (2016)","IsRemote":false,"RunTimeTicks":64321331200,"ReadAtNativeFramerate":false,"DiscardCorruptPts":false,"FillWallClockDts":false,"IgnoreDts":false,"IgnoreIndex":false,"SupportsTranscoding":true,"SupportsDirectStream":true,"SupportsDirectPlay":true,"IsInfiniteStream":false,"RequiresOpening":false,"RequiresClosing":false,"RequiresLooping":false,"SupportsProbing":true,"MediaStreams":[{"Codec":"h264","CodecTag":"avc1","Language":"eng","ColorTransfer":"bt709","ColorPrimaries":"bt709","ColorSpace":"bt709","TimeBase":"1/30000","CodecTimeBase":"1/60","VideoRange":"SDR","DisplayTitle":"1080p H264","NalLengthSize":"4","IsInterlaced":false,"IsAVC":true,"BitRate":3187540,"BitDepth":8,"RefFrames":1,"IsDefault":true,"IsForced":false,"Height":1080,"Width":1920,"AverageFrameRate":30,"RealFrameRate":30,"Profile":"Main","Type":"Video","AspectRatio":"16:9","Index":0,"IsExternal":false,"IsTextSubtitleStream":false,"SupportsExternalStream":false,"PixelFormat":"yuv420p","Level":31,"IsAnamorphic":false},{"Codec":"aac","CodecTag":"mp4a","Language":"eng","TimeBase":"1/48000","CodecTimeBase":"1/48000","DisplayTitle":"Eng AAC 5.1 Default","IsInterlaced":false,"ChannelLayout":"5.1","BitRate":552171,"Channels":6,"SampleRate":48000,"IsDefault":true,"IsForced":false,"Profile":"LC","Type":"Audio","Index":1,"IsExternal":false,"IsTextSubtitleStream":false,"SupportsExternalStream":false,"Level":0},{"Codec":"srt","Language":"eng","DisplayTitle":"Eng","IsInterlaced":false,"IsDefault":false,"IsForced":false,"Type":"Subtitle","Index":2,"IsExternal":true,"IsTextSubtitleStream":true,"SupportsExternalStream":true,"Path":"/volume1/EMBY/KIDS! Movies/Animated/x.eng.srt"}],"Formats":[],"Bitrate":3748536,"RequiredHttpHeaders":{}}

User policy for Kaden: EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True

Affected codecs:

>>>>>> VAAPI Intel Corporation Device 23173 - H.264 (AVC)

Adapter #0: 'Intel Corporation Device 23173' Id:23173 (Driver: Intel i965 driver for Intel® Broxton - 2.2.0, Vendor: Intel Corporation)

Frame Sizes: max 4096x4096

Color Formats: NV12

Profiles: Constrained Baseline Profile (Level 6), Main Profile (Level 6), High Profile (Level 6)

>>>>>> VAAPI Intel Corporation Device 23173 - H.264 (AVC)

Adapter #0: 'Intel Corporation Device 23173' Id:23173 (Driver: Intel i965 driver for Intel® Broxton - 2.2.0, Vendor: Intel Corporation)

Frame Sizes: 32x32...4096x4096

Color Formats: NV12, P010LE

Profiles: Constrained Baseline Profile (Level 6), Main Profile (Level 6), High Profile (Level 6)

>>>>>> FindVideoDecoder - MediaType: h264, Mode: 1

Info FindVideoDecoder - Checking: 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)' (Priority: 60)

Info FindVideoDecoder - Check successful - selecting 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)'

>>>>>> FindVideoEncoder - Media: h264, UseHardwareCodecs: True, Mode: 1

Info FindVideoEncoder - Checking: 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)' (Priority: 60)

Info Encoder supports input stream

Info FindVideoEncoder - Check successful - selecting 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)'

>>>>>> FindVideoDecoder - MediaType: h264, Mode: 1

Info FindVideoDecoder - Checking: 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)' (Priority: 60)

Info FindVideoDecoder - Check successful - selecting 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)'

>>>>>> FindVideoEncoder - Media: h264, UseHardwareCodecs: True, Mode: 1

Info FindVideoEncoder - Checking: 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)' (Priority: 60)

Info Encoder supports input stream

Info FindVideoEncoder - Check successful - selecting 'VAAPI Intel Corporation Device 23173 - H.264 (AVC)'

/var/packages/EmbyServer/target/ffmpeg/bin/ffmpeg -ss 00:20:24.000 -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi -f mp4 -i file:"/volume1/EMBY/KIDS! Movies/Animated/x).mp4" -threads 0 -map 0:0 -map 0:1 -map -0:s -c:v:0 h264_vaapi -filter_complex "[0:0]scale_vaapi=w=720:h=404" -b:v:0 2495448 -maxrate 2495448 -bufsize 4990896 -profile high -level 4.1 -look_ahead 0 -force_key_frames "expr:if(isnan(prev_forced_t),eq(t,t),gte(t,prev_forced_t+3))" -copyts -vsync -1 -codec:a:0 copy -metadata:s:a:0 language=eng -disposition:a:0 default -f segment -max_delay 5000000 -avoid_negative_ts disabled -map_metadata -1 -map_chapters -1 -start_at_zero -segment_time 3 -segment_time_delta -1224 -individual_header_trailer 0 -segment_format mpegts -segment_list_type m3u8 -segment_start_number 408 -segment_list "/var/packages/EmbyServer/target/var/transcoding-temp/561084c9d8861de2a1b74d597fbd180c.m3u8" -y "/var/packages/EmbyServer/target/var/transcoding-temp/561084c9d8861de2a1b74d597fbd180c%d.ts"

built with gcc 7.3.0 (GCC)

configuration: --prefix=/var/packages/EmbyServer/target/ffmpeg --enable-cross-compile --cross-prefix=x86_64-syno-linux-gnu- --target-os=linux --disable-rpath --enable-pthreads --arch=x86_64 --enable-libzimg --enable-libmfx --enable-vaapi --enable-x86asm --enable-gpl --enable-shared --disable-static --disable-debug --disable-ffplay --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --enable-gnutls --enable-libass --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libfreetype --enable-fontconfig --enable-gray --enable-libfribidi --enable-libvidstab --enable-libzvbi --disable-indev=sndio --disable-outdev=sndio --extra-version=20181220T011603UTC --extra-libs='-luuid -lstdc++'

libavutil 56. 14.100 / 56. 14.100

libavcodec 58. 18.100 / 58. 18.100

libavformat 58. 12.100 / 58. 12.100

libavdevice 58. 3.100 / 58. 3.100

libavfilter 7. 16.100 / 7. 16.100

libswscale 5. 1.100 / 5. 1.100

libswresample 3. 1.100 / 3. 1.100

libpostproc 55. 1.100 / 55. 1.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file:/volume1/EMBY/KIDS! Movies/Animated/x.mp4':

Metadata:

major_brand : mp42

minor_version : 0

compatible_brands: mp42isom

creation_time : 2017-08-15T21:57:46.000000Z

Duration: 01:47:12.13, start: 0.000000, bitrate: 3748 kb/s

Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(bt709), 1920x1080 [sAR 1:1 DAR 16:9], 3187 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)

Metadata:

creation_time : 2017-08-15T21:57:46.000000Z

Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 552 kb/s (default)

Metadata:

creation_time : 2017-08-15T21:57:46.000000Z

Please use -profile:a or -profile:v, -profile is ambiguous

Stream mapping:

Stream #0:0 (h264) -> scale_vaapi

scale_vaapi -> Stream #0:0 (h264_vaapi)

Stream #0:1 -> #0:1 (copy)

Press [q] to stop, [?] for help

[segment @ 0x6bfd40] Opening '/var/packages/EmbyServer/target/var/transcoding-temp/561084c9d8861de2a1b74d597fbd180c408.ts' for writing

Output #0, segment, to '/var/packages/EmbyServer/target/var/transcoding-temp/561084c9d8861de2a1b74d597fbd180c%d.ts':

Metadata:

encoder : Lavf58.12.100

Stream #0:0: Video: h264 (h264_vaapi) (High), vaapi_vld, 720x404 [sAR 404:405 DAR 16:9], q=0-31, 2495 kb/s, 30 fps, 90k tbn, 30 tbc (default)

Metadata:

encoder : Lavc58.18.100 h264_vaapi

Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 552 kb/s (default)

frame= 46 fps=0.0 q=-0.0 size=N/A time=00:20:26.09 bitrate=N/A speed=2.43e+03x