FFMPEG h.264 stream to VLC from raw YUV444 produces black screen and audio noise
I am piping raw YUV444 640x480 frames to ffmpeg from inside a C++ program using stdout (Pipe format: pipe<-Y<-U<-V whole frames each). ffmpeg encodes them using h.264 and streams the video via UDP to an IP of my choice.
When I am not streaming and saving the video on the recording device as -mp4 file with ffmpeg, everything works - But when I stream over the network and try to receive in VLC, the stream is received and the playing timer under the video screen runs,but the image is black, none of the video is displayed. Also I have some crackling sounds on my audio output. The raw video does not have an audio track.
My ffmpeg settings are as follows:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 -f mpegts udp://192.168.150.1:20001
in VLC (GUI), I just use "open network stream" with udp://@:20001. The port is open, I tested it with a simple dummy sender/receiver. Almost the same cli arguments for the video recording lead to a perfectly playable video when writing to a file and downloading it:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 video.mp4
If I try to stream the same recorded video using
ffmpeg -i video.mp4 -v 0 -vcodec mpeg4 -f mpegts udp://192.168.150:20001
I get a black screen again, like above.
The VLC log output identifies my stream as mp3, so maybe stream type recognition is to blame. But why?
Here are the ffmpeg console output and the VLC log.
What am I doing wrong?
PS: Moved this question over here from Stack Overflow because it was not getting any answers, old unanswered duplicate is deleted.
video ffmpeg vlc-media-player streaming h.264
asked Dec 4 at 13:06
GerbGerb
11
|
show 1 more comment
I am piping raw YUV444 640x480 frames to ffmpeg from inside a C++ program using stdout (Pipe format: pipe<-Y<-U<-V whole frames each). ffmpeg encodes them using h.264 and streams the video via UDP to an IP of my choice.
When I am not streaming and saving the video on the recording device as -mp4 file with ffmpeg, everything works - But when I stream over the network and try to receive in VLC, the stream is received and the playing timer under the video screen runs,but the image is black, none of the video is displayed. Also I have some crackling sounds on my audio output. The raw video does not have an audio track.
My ffmpeg settings are as follows:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 -f mpegts udp://192.168.150.1:20001
in VLC (GUI), I just use "open network stream" with udp://@:20001. The port is open, I tested it with a simple dummy sender/receiver. Almost the same cli arguments for the video recording lead to a perfectly playable video when writing to a file and downloading it:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 video.mp4
If I try to stream the same recorded video using
ffmpeg -i video.mp4 -v 0 -vcodec mpeg4 -f mpegts udp://192.168.150:20001
I get a black screen again, like above.
The VLC log output identifies my stream as mp3, so maybe stream type recognition is to blame. But why?
Here are the ffmpeg console output and the VLC log.
What am I doing wrong?
PS: Moved this question over here from Stack Overflow because it was not getting any answers, old unanswered duplicate is deleted.
video ffmpeg vlc-media-player streaming h.264
asked Dec 4 at 13:06
GerbGerb
11
Do other players receive it ok?
– Gyan
Dec 4 at 17:55
Wohoo! You were totally on the right track. I tried SMPlayer and PotPlayer (What a name) and PotPlayer could play it! The question remains: Why doesn't VLC?
– GerbGerb
Dec 4 at 20:16
I'll look into it tomorrow.
– Gyan
Dec 4 at 20:39
Update: I tried also with OpenCV(Python3)'s VideoCapture. This produces a highly corrupted image and a ton of "error while decoding". Could it be that VLC and OpenCV use the same decoder, which has problems with h.264?
– GerbGerb
Dec 6 at 10:05
Appears to be related to this: trac.videolan.org/vlc/ticket/21024. Downgrade VLC or use another player.
– Gyan
Dec 6 at 11:10
|
show 1 more comment
I am piping raw YUV444 640x480 frames to ffmpeg from inside a C++ program using stdout (Pipe format: pipe<-Y<-U<-V whole frames each). ffmpeg encodes them using h.264 and streams the video via UDP to an IP of my choice.
When I am not streaming and saving the video on the recording device as -mp4 file with ffmpeg, everything works - But when I stream over the network and try to receive in VLC, the stream is received and the playing timer under the video screen runs,but the image is black, none of the video is displayed. Also I have some crackling sounds on my audio output. The raw video does not have an audio track.
My ffmpeg settings are as follows:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 -f mpegts udp://192.168.150.1:20001
in VLC (GUI), I just use "open network stream" with udp://@:20001. The port is open, I tested it with a simple dummy sender/receiver. Almost the same cli arguments for the video recording lead to a perfectly playable video when writing to a file and downloading it:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 video.mp4
If I try to stream the same recorded video using
ffmpeg -i video.mp4 -v 0 -vcodec mpeg4 -f mpegts udp://192.168.150:20001
I get a black screen again, like above.
The VLC log output identifies my stream as mp3, so maybe stream type recognition is to blame. But why?
Here are the ffmpeg console output and the VLC log.
What am I doing wrong?
PS: Moved this question over here from Stack Overflow because it was not getting any answers, old unanswered duplicate is deleted.
video ffmpeg vlc-media-player streaming h.264
asked Dec 4 at 13:06
GerbGerb
11
I am piping raw YUV444 640x480 frames to ffmpeg from inside a C++ program using stdout (Pipe format: pipe<-Y<-U<-V whole frames each). ffmpeg encodes them using h.264 and streams the video via UDP to an IP of my choice.
When I am not streaming and saving the video on the recording device as -mp4 file with ffmpeg, everything works - But when I stream over the network and try to receive in VLC, the stream is received and the playing timer under the video screen runs,but the image is black, none of the video is displayed. Also I have some crackling sounds on my audio output. The raw video does not have an audio track.
My ffmpeg settings are as follows:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 -f mpegts udp://192.168.150.1:20001
in VLC (GUI), I just use "open network stream" with udp://@:20001. The port is open, I tested it with a simple dummy sender/receiver. Almost the same cli arguments for the video recording lead to a perfectly playable video when writing to a file and downloading it:
ffmpeg -y -loglevel verbose -f rawvideo -r 25 -c:v rawvideo -pix_fmt yuv444p -s 640x480 -i - -c:v libx264 -preset superfast -framerate 25 video.mp4
If I try to stream the same recorded video using
ffmpeg -i video.mp4 -v 0 -vcodec mpeg4 -f mpegts udp://192.168.150:20001
I get a black screen again, like above.
The VLC log output identifies my stream as mp3, so maybe stream type recognition is to blame. But why?
Here are the ffmpeg console output and the VLC log.
What am I doing wrong?
PS: Moved this question over here from Stack Overflow because it was not getting any answers, old unanswered duplicate is deleted.
video ffmpeg vlc-media-player streaming h.264
video ffmpeg vlc-media-player streaming h.264
asked Dec 4 at 13:06
GerbGerb
11
asked Dec 4 at 13:06
GerbGerb
11
asked Dec 4 at 13:06
GerbGerb
11
asked Dec 4 at 13:06
GerbGerb
11
asked Dec 4 at 13:06
GerbGerb
11
11
Do other players receive it ok?
– Gyan
Dec 4 at 17:55
Wohoo! You were totally on the right track. I tried SMPlayer and PotPlayer (What a name) and PotPlayer could play it! The question remains: Why doesn't VLC?
– GerbGerb
Dec 4 at 20:16
I'll look into it tomorrow.
– Gyan
Dec 4 at 20:39
Update: I tried also with OpenCV(Python3)'s VideoCapture. This produces a highly corrupted image and a ton of "error while decoding". Could it be that VLC and OpenCV use the same decoder, which has problems with h.264?
– GerbGerb
Dec 6 at 10:05
Appears to be related to this: trac.videolan.org/vlc/ticket/21024. Downgrade VLC or use another player.
– Gyan
Dec 6 at 11:10
|
show 1 more comment
Do other players receive it ok?
– Gyan
Dec 4 at 17:55
Wohoo! You were totally on the right track. I tried SMPlayer and PotPlayer (What a name) and PotPlayer could play it! The question remains: Why doesn't VLC?
– GerbGerb
Dec 4 at 20:16
I'll look into it tomorrow.
– Gyan
Dec 4 at 20:39
Update: I tried also with OpenCV(Python3)'s VideoCapture. This produces a highly corrupted image and a ton of "error while decoding". Could it be that VLC and OpenCV use the same decoder, which has problems with h.264?
– GerbGerb
Dec 6 at 10:05
Appears to be related to this: trac.videolan.org/vlc/ticket/21024. Downgrade VLC or use another player.
– Gyan
Dec 6 at 11:10
Do other players receive it ok?
– Gyan
Dec 4 at 17:55
Do other players receive it ok?
– Gyan
Dec 4 at 17:55
Wohoo! You were totally on the right track. I tried SMPlayer and PotPlayer (What a name) and PotPlayer could play it! The question remains: Why doesn't VLC?
– GerbGerb
Dec 4 at 20:16
Wohoo! You were totally on the right track. I tried SMPlayer and PotPlayer (What a name) and PotPlayer could play it! The question remains: Why doesn't VLC?
– GerbGerb
Dec 4 at 20:16
I'll look into it tomorrow.
– Gyan
Dec 4 at 20:39
I'll look into it tomorrow.
– Gyan
Dec 4 at 20:39
Update: I tried also with OpenCV(Python3)'s VideoCapture. This produces a highly corrupted image and a ton of "error while decoding". Could it be that VLC and OpenCV use the same decoder, which has problems with h.264?
– GerbGerb
Dec 6 at 10:05
Update: I tried also with OpenCV(Python3)'s VideoCapture. This produces a highly corrupted image and a ton of "error while decoding". Could it be that VLC and OpenCV use the same decoder, which has problems with h.264?
– GerbGerb
Dec 6 at 10:05
Appears to be related to this: trac.videolan.org/vlc/ticket/21024. Downgrade VLC or use another player.
– Gyan
Dec 6 at 11:10
Appears to be related to this: trac.videolan.org/vlc/ticket/21024. Downgrade VLC or use another player.
– Gyan
Dec 6 at 11:10
|
show 1 more comment
1 Answer
1
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While the underlying issue has not been resolved, @Gyans hints helped me to solve my problem. Using other players (PotPlayer) or an older version of VLC got the stream display to work, and that is all I needed.
answered Dec 7 at 18:29
GerbGerb
11
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While the underlying issue has not been resolved, @Gyans hints helped me to solve my problem. Using other players (PotPlayer) or an older version of VLC got the stream display to work, and that is all I needed.
answered Dec 7 at 18:29
GerbGerb
11
add a comment |
While the underlying issue has not been resolved, @Gyans hints helped me to solve my problem. Using other players (PotPlayer) or an older version of VLC got the stream display to work, and that is all I needed.
answered Dec 7 at 18:29
GerbGerb
11
add a comment |
While the underlying issue has not been resolved, @Gyans hints helped me to solve my problem. Using other players (PotPlayer) or an older version of VLC got the stream display to work, and that is all I needed.
answered Dec 7 at 18:29
GerbGerb
11
While the underlying issue has not been resolved, @Gyans hints helped me to solve my problem. Using other players (PotPlayer) or an older version of VLC got the stream display to work, and that is all I needed.
answered Dec 7 at 18:29
GerbGerb
11
answered Dec 7 at 18:29
GerbGerb
11
answered Dec 7 at 18:29
GerbGerb
11
answered Dec 7 at 18:29
GerbGerb
11
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Do other players receive it ok?
– Gyan
Dec 4 at 17:55
Wohoo! You were totally on the right track. I tried SMPlayer and PotPlayer (What a name) and PotPlayer could play it! The question remains: Why doesn't VLC?
– GerbGerb
Dec 4 at 20:16
I'll look into it tomorrow.
– Gyan
Dec 4 at 20:39
Update: I tried also with OpenCV(Python3)'s VideoCapture. This produces a highly corrupted image and a ton of "error while decoding". Could it be that VLC and OpenCV use the same decoder, which has problems with h.264?
– GerbGerb
Dec 6 at 10:05
Appears to be related to this: trac.videolan.org/vlc/ticket/21024. Downgrade VLC or use another player.
– Gyan
Dec 6 at 11:10